Problem could be seen on JTAC local testbed AIO50:

GUI access:
https://10.85.188.50:8143/
admin/Juniper

terminal access:
ssh root@10.85.188.50
Juniper

Tenant-A:
VN-A  (global_access 7 and add Tenant-B in Permissons->Share List)
Floating-VA-A (global_access 7 and add Tenant-B in Permissons->Share List)

Tenant-B:
VN-A is visible in GUI
Floating-VA-A is invisible in GUI

<<<Actually floating-ip-pool Floating-VA-A is good in the Tenant-B curl output.
<<<So the GUI invisible issue should have other reasons behind


VN-A and Floating-VA-A in vnc-config
===========
root@aio50:~# curl -u admin:Juniper http://localhost:8095/virtual-networks | python -mjson.tool | egrep -C4 VN-A
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2135  100  2135    0     0   233k      0 --:--:-- --:--:-- --:--:--  260k
        {
            "fq_name": [
                "default-domain",
                "Tenant-A",
                "VN-A"
            ],
            "href": "http://localhost:8095/virtual-network/b59a34f3-e39e-4d18-9d27-b9fd9243c30f",
            "uuid": "b59a34f3-e39e-4d18-9d27-b9fd9243c30f"
        },

root@aio50:~# curl -u admin:Juniper http://localhost:8095/floating-ip-pools | python -mjson.tool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   228  100   228    0     0  70522      0 --:--:-- --:--:-- --:--:-- 76000
{
    "floating-ip-pools": [
        {
            "fq_name": [
                "default-domain",
                "Tenant-A",
                "VN-A",
                "Floating-VA-A"
            ],
            "href": "http://localhost:8095/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c",
            "uuid": "33e3fe1b-1d71-4a09-9ab4-79df9d96a74c"
        }
    ]
}
root@aio50:~# curl -u admin:Juniper http://localhost:8095/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c | python -mjson.tool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1222  100  1222    0     0  99495      0 --:--:-- --:--:-- --:--:--   99k
{
    "floating-ip-pool": {
        "display_name": "Floating-VA-A",
        "fq_name": [
            "default-domain",
            "Tenant-A",
            "VN-A",
            "Floating-VA-A"
        ],
        "href": "http://localhost:8095/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c",
        "id_perms": {
            "created": "2018-04-27T19:48:22.201396",
            "creator": null,
            "description": null,
            "enable": true,
            "last_modified": "2018-04-27T20:55:39.725084",
            "permissions": {
                "group": "_member_",
                "group_access": 7,
                "other_access": 7,
                "owner": "user-a",
                "owner_access": 7
            },
            "user_visible": true,
            "uuid": {
                "uuid_lslong": 11147668978977384268,
                "uuid_mslong": 3739111508059179529
            }
        },
        "name": "Floating-VA-A",
        "parent_href": "http://localhost:8095/virtual-network/b59a34f3-e39e-4d18-9d27-b9fd9243c30f",
        "parent_type": "virtual-network",
        "parent_uuid": "b59a34f3-e39e-4d18-9d27-b9fd9243c30f",
        "perms2": {
            "global_access": 7,
            "owner": "a7d39c3b7cb14e0c94bf5f2c572788fd",
            "owner_access": 7,
            "share": [
                {
                    "tenant": "df6331e4-9bcb-450c-b1d5-03e9c02c0702",
                    "tenant_access": 7
                }
            ]
        },
        "project_back_refs": [
            {
                "attr": null,
                "href": "http://localhost:8095/project/df6331e4-9bcb-450c-b1d5-03e9c02c0702",
                "to": [
                    "default-domain",
                    "Tenant-B"
                ],
                "uuid": "df6331e4-9bcb-450c-b1d5-03e9c02c0702"
            }
        ],
        "uuid": "33e3fe1b-1d71-4a09-9ab4-79df9d96a74c"
    }
}


Tenant-A curl output
=============
curl -s -X POST http://localhost:5000/v2.0/tokens -H "Content-Type: application/json" -d '{ "auth": {"tenantName": "Tenant-A", "passwordCredentials": { "username": "admin", "password": "Juniper" }}}' | python -m json.tool

root@aio50:~# curl -s -X POST http://localhost:5000/v2.0/tokens -H "Content-Type: application/json" -d '{ "auth": {"tenantName": "Tenant-A", "passwordCredentials": { "username": "admin", "password": "Juniper" }}}' | python -m json.tool | egrep -A13 token
        "token": {
            "audit_ids": [
                "2IHhaHcxRTKj3nWkrUhiNQ"
            ],
            "expires": "2018-04-27T22:06:26Z",
            "id": "1b9a457090b94dddba5d94a2d2efc5f8",
            "issued_at": "2018-04-27T21:06:26.878533",
            "tenant": {
                "description": "",
                "enabled": true,
                "id": "a7d39c3b7cb14e0c94bf5f2c572788fd",
                "name": "Tenant-A"
            }
        },

curl -s -H "X-Auth-Token: 1b9a457090b94dddba5d94a2d2efc5f8" http://localhost:5000/v2.0/tenants | python -m json.tool


root@aio50:~# curl -s -H "X-Auth-Token: 1b9a457090b94dddba5d94a2d2efc5f8" http://localhost:5000/v2.0/tenants | python -m json.tool
{
    "tenants": [
        {
            "description": null,
            "enabled": true,
            "id": "07007e67196d4a97b8610b0d9daa5eaf",
            "name": "admin"
        },
        {
            "description": null,
            "enabled": true,
            "id": "7aa371a3fc304098949d69384567a71c",
            "name": "demo"
        },
        {
            "description": "",
            "enabled": true,
            "id": "a7d39c3b7cb14e0c94bf5f2c572788fd",
            "name": "Tenant-A"
        },
        {
            "description": "",
            "enabled": true,
            "id": "df6331e49bcb450cb1d503e9c02c0702",
            "name": "Tenant-B"
        }
    ],
    "tenants_links": []
}


curl -s -H "X-Auth-Token: 1b9a457090b94dddba5d94a2d2efc5f8" http://localhost:9100/floating-ip-pools | python -m json.tool

root@aio50:~# curl -s -H "X-Auth-Token: 1b9a457090b94dddba5d94a2d2efc5f8" http://localhost:9100/floating-ip-pools | python -m json.tool
{
    "floating-ip-pools": [
        {
            "fq_name": [
                "default-domain",
                "Tenant-A",
                "VN-A",
                "Floating-VA-A"
            ],
            "href": "http://localhost:9100/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c",
            "uuid": "33e3fe1b-1d71-4a09-9ab4-79df9d96a74c"
        }
    ]
}
root@aio50:~# curl -s -H "X-Auth-Token: 1b9a457090b94dddba5d94a2d2efc5f8" http://localhost:9100/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c | python -m json.tool
{
    "floating-ip-pool": {
        "display_name": "Floating-VA-A",
        "fq_name": [
            "default-domain",
            "Tenant-A",
            "VN-A",
            "Floating-VA-A"
        ],
        "href": "http://localhost:9100/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c",
        "id_perms": {
            "created": "2018-04-27T19:48:22.201396",
            "creator": null,
            "description": null,
            "enable": true,
            "last_modified": "2018-04-27T20:55:39.725084",
            "permissions": {
                "group": "_member_",
                "group_access": 7,
                "other_access": 7,
                "owner": "user-a",
                "owner_access": 7
            },
            "user_visible": true,
            "uuid": {
                "uuid_lslong": 11147668978977384268,
                "uuid_mslong": 3739111508059179529
            }
        },
        "name": "Floating-VA-A",
        "parent_href": "http://localhost:9100/virtual-network/b59a34f3-e39e-4d18-9d27-b9fd9243c30f",
        "parent_type": "virtual-network",
        "parent_uuid": "b59a34f3-e39e-4d18-9d27-b9fd9243c30f",
        "perms2": {
            "global_access": 7,
            "owner": "a7d39c3b7cb14e0c94bf5f2c572788fd",
            "owner_access": 7,
            "share": [
                {
                    "tenant": "df6331e4-9bcb-450c-b1d5-03e9c02c0702",
                    "tenant_access": 7
                }
            ]
        },
        "project_back_refs": [
            {
                "attr": null,
                "href": "http://localhost:9100/project/df6331e4-9bcb-450c-b1d5-03e9c02c0702",
                "to": [
                    "default-domain",
                    "Tenant-B"
                ],
                "uuid": "df6331e4-9bcb-450c-b1d5-03e9c02c0702"
            }
        ],
        "uuid": "33e3fe1b-1d71-4a09-9ab4-79df9d96a74c"
    }
}


Tenant-B curl output
<<<Actually floating-ip-pool Floating-VA-A is good in the Tenant-B curl output.
<<<So the GUI invisible issue should have other reasons behind
=============
curl -s -X POST http://localhost:5000/v2.0/tokens -H "Content-Type: application/json" -d '{ "auth": {"tenantName": "Tenant-B", "passwordCredentials": { "username": "admin", "password": "Juniper" }}}' | python -m json.tool

root@aio50:~# curl -s -X POST http://localhost:5000/v2.0/tokens -H "Content-Type: application/json" -d '{ "auth": {"tenantName": "Tenant-B", "passwordCredentials": { "username": "admin", "password": "Juniper" }}}' | python -m json.tool | egrep -A13 token
        "token": {
            "audit_ids": [
                "YWPTqu9XQW6VdS1yeA9Q8w"
            ],
            "expires": "2018-04-27T22:10:33Z",
            "id": "1dd4e414700b49dbb488809e30a54c9d",
            "issued_at": "2018-04-27T21:10:33.065971",
            "tenant": {
                "description": "",
                "enabled": true,
                "id": "df6331e49bcb450cb1d503e9c02c0702",
                "name": "Tenant-B"
            }
        },

curl -s -H "X-Auth-Token: 1dd4e414700b49dbb488809e30a54c9d" http://localhost:9100/floating-ip-pools | python -m json.tool

root@aio50:~# curl -s -H "X-Auth-Token: 1dd4e414700b49dbb488809e30a54c9d" http://localhost:9100/floating-ip-pools | python -m json.tool
{
    "floating-ip-pools": [
        {
            "fq_name": [
                "default-domain",
                "Tenant-A",
                "VN-A",
                "Floating-VA-A"
            ],
            "href": "http://localhost:9100/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c",
            "uuid": "33e3fe1b-1d71-4a09-9ab4-79df9d96a74c"
        }
    ]
}

root@aio50:~# curl -s -H "X-Auth-Token: 1dd4e414700b49dbb488809e30a54c9d" http://localhost:9100/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c | python -m json.tool
{
    "floating-ip-pool": {
        "display_name": "Floating-VA-A",
        "fq_name": [
            "default-domain",
            "Tenant-A",
            "VN-A",
            "Floating-VA-A"
        ],
        "href": "http://localhost:9100/floating-ip-pool/33e3fe1b-1d71-4a09-9ab4-79df9d96a74c",
        "id_perms": {
            "created": "2018-04-27T19:48:22.201396",
            "creator": null,
            "description": null,
            "enable": true,
            "last_modified": "2018-04-27T20:55:39.725084",
            "permissions": {
                "group": "_member_",
                "group_access": 7,
                "other_access": 7,
                "owner": "user-a",
                "owner_access": 7
            },
            "user_visible": true,
            "uuid": {
                "uuid_lslong": 11147668978977384268,
                "uuid_mslong": 3739111508059179529
            }
        },
        "name": "Floating-VA-A",
        "parent_href": "http://localhost:9100/virtual-network/b59a34f3-e39e-4d18-9d27-b9fd9243c30f",
        "parent_type": "virtual-network",
        "parent_uuid": "b59a34f3-e39e-4d18-9d27-b9fd9243c30f",
        "perms2": {
            "global_access": 7,
            "owner": "a7d39c3b7cb14e0c94bf5f2c572788fd",
            "owner_access": 7,
            "share": [
                {
                    "tenant": "df6331e4-9bcb-450c-b1d5-03e9c02c0702",
                    "tenant_access": 7
                }
            ]
        },
        "project_back_refs": [
            {
                "attr": null,
                "href": "http://localhost:9100/project/df6331e4-9bcb-450c-b1d5-03e9c02c0702",
                "to": [
                    "default-domain",
                    "Tenant-B"
                ],
                "uuid": "df6331e4-9bcb-450c-b1d5-03e9c02c0702"
            }
        ],
        "uuid": "33e3fe1b-1d71-4a09-9ab4-79df9d96a74c"
    }
}