I have verified each test case using openssh-server 1:9.0p1-1ubuntu7.1 from kinetic-proposed:

Test #1:

root@jammy:~# grep "^ListenAddress" /etc/ssh/sshd_config
ListenAddress 0.0.0.0:1234
root@jammy:~# systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
    Drop-In: /run/systemd/system/service.d
             └─zzz-lxc-service.conf
     Active: active (running) since Thu 2022-11-03 10:22:04 UTC; 30s ago
       Docs: man:sshd(8)
             man:sshd_config(5)
    Process: 868 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
   Main PID: 869 (sshd)
      Tasks: 1 (limit: 18901)
     Memory: 1.7M
        CPU: 19ms
     CGroup: /system.slice/ssh.service
             └─869 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"

Nov 03 10:22:04 jammy systemd[1]: Starting OpenBSD Secure Shell server...
Nov 03 10:22:04 jammy sshd[869]: Server listening on 0.0.0.0 port 1234.
Nov 03 10:22:04 jammy systemd[1]: Started OpenBSD Secure Shell server.
root@jammy:~# vi /etc/apt/sources.list
root@jammy:~# cat /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu kinetic main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu kinetic-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu kinetic-proposed main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu kinetic-security main restricted universe multiverse
root@jammy:~# apt update && apt dist-upgrade -y
[...]
root@jammy:~# cat /etc/systemd/system/ssh.socket.d/addresses.conf 
[Socket]
ListenStream=
ListenStream=0.0.0.0:1234
root@jammy:~# systemctl status ssh.socket
● ssh.socket - OpenBSD Secure Shell server socket
     Loaded: loaded (/lib/systemd/system/ssh.socket; enabled; preset: enabled)
    Drop-In: /etc/systemd/system/ssh.socket.d
             └─addresses.conf
     Active: active (listening) since Thu 2022-11-03 10:31:12 UTC; 23s ago
      Until: Thu 2022-11-03 10:31:12 UTC; 23s ago
   Triggers: ● ssh.service
     Listen: 0.0.0.0:1234 (Stream)
      Tasks: 0 (limit: 18901)
     Memory: 8.0K
        CPU: 332us
     CGroup: /system.slice/ssh.socket

Nov 03 10:31:12 jammy systemd[1]: Listening on OpenBSD Secure Shell server socket.
---
Test #2:

root@jammy:~# grep "^ListenAddress" /etc/ssh/sshd_config
ListenAddress 0.0.0.0:1234
ListenAddress [::]:4321
root@jammy:~# systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
    Drop-In: /run/systemd/system/service.d
             └─zzz-lxc-service.conf
     Active: active (running) since Thu 2022-11-03 10:33:34 UTC; 4s ago
       Docs: man:sshd(8)
             man:sshd_config(5)
    Process: 868 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
   Main PID: 869 (sshd)
      Tasks: 1 (limit: 18901)
     Memory: 1.7M
        CPU: 42ms
     CGroup: /system.slice/ssh.service
             └─869 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"

Nov 03 10:33:34 jammy systemd[1]: Starting OpenBSD Secure Shell server...
Nov 03 10:33:34 jammy sshd[869]: Server listening on :: port 4321.
Nov 03 10:33:34 jammy sshd[869]: Server listening on 0.0.0.0 port 1234.
Nov 03 10:33:34 jammy systemd[1]: Started OpenBSD Secure Shell server.
root@jammy:~# vi /etc/apt/sources.list
root@jammy:~# cat /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu kinetic main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu kinetic-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu kinetic-proposed main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu kinetic-security main restricted universe multiverse
root@jammy:~# apt update && apt dist-upgrade -y
[...]
root@jammy:~# ls -alh /etc/systemd/system/ssh*
lrwxrwxrwx 1 root root 31 Nov  3 10:33 /etc/systemd/system/sshd.service -> /lib/systemd/system/ssh.service
root@jammy:~# systemctl status ssh.socket
○ ssh.socket - OpenBSD Secure Shell server socket
     Loaded: loaded (/lib/systemd/system/ssh.socket; disabled; preset: enabled)
     Active: inactive (dead)
   Triggers: ● ssh.service
     Listen: [::]:22 (Stream)
root@jammy:~# systemctl status ssh.service
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; preset: enabled)
    Drop-In: /run/systemd/system/service.d
             └─zzz-lxc-service.conf
     Active: active (running) since Thu 2022-11-03 10:38:25 UTC; 33s ago
       Docs: man:sshd(8)
             man:sshd_config(5)
   Main PID: 7153 (sshd)
      Tasks: 1 (limit: 18901)
     Memory: 1.4M
        CPU: 13ms
     CGroup: /system.slice/ssh.service
             └─7153 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"

Nov 03 10:38:25 jammy systemd[1]: Starting OpenBSD Secure Shell server...
Nov 03 10:38:25 jammy sshd[7153]: Server listening on :: port 4321.
Nov 03 10:38:25 jammy sshd[7153]: Server listening on 0.0.0.0 port 1234.
Nov 03 10:38:25 jammy systemd[1]: Started OpenBSD Secure Shell server.
---
Test #3:

root@jammy:~# apt update && apt dist-upgrade -y
[...]
Setting up openssh-server (1:9.0p1-1ubuntu7) ...
Synchronizing state of ssh.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install disable ssh
Removed "/etc/systemd/system/sshd.service".
Removed "/etc/systemd/system/multi-user.target.wants/ssh.service".
Created symlink /etc/systemd/system/sockets.target.wants/ssh.socket → /lib/systemd/system/ssh.socket.
rescue-ssh.target is a disabled or a static unit not running, not starting it.
Failed to restart ssh.socket: Unit ssh.socket has a bad unit file setting.
See system logs and 'systemctl status ssh.socket' for details.
Could not execute systemctl:  at /usr/bin/deb-systemd-invoke line 145.
dpkg: error processing package openssh-server (--configure):
 installed openssh-server package post-installation script subprocess returned error exit status 1
[...]
Errors were encountered while processing:
 openssh-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@jammy:~# grep "^ListenAddress" /etc/ssh/sshd_config
ListenAddress 0.0.0.0:1234
root@jammy:~# cat /etc/systemd/system/ssh.socket.d/addresses.conf 
[Socket]
ListenStream=
root@jammy:~# cat <<EOF >/etc/apt/sources.list.d/ubuntu-$(lsb_release -cs)-proposed.list
# Enable Ubuntu proposed archive
deb http://archive.ubuntu.com/ubuntu/ $(lsb_release -cs)-proposed restricted main multiverse universe
EOF
root@jammy:~# apt update && apt install openssh-server -y
[...]
root@jammy:~# systemctl status ssh.socket
● ssh.socket - OpenBSD Secure Shell server socket
     Loaded: loaded (/lib/systemd/system/ssh.socket; enabled; preset: enabled)
    Drop-In: /etc/systemd/system/ssh.socket.d
             └─addresses.conf
     Active: active (listening) since Thu 2022-11-03 11:02:39 UTC; 7s ago
      Until: Thu 2022-11-03 11:02:39 UTC; 7s ago
   Triggers: ● ssh.service
     Listen: 0.0.0.0:1234 (Stream)
      Tasks: 0 (limit: 18901)
     Memory: 8.0K
        CPU: 319us
     CGroup: /system.slice/ssh.socket

Nov 03 11:02:39 jammy systemd[1]: Listening on OpenBSD Secure Shell server socket.
root@jammy:~# cat /etc/systemd/system/ssh.socket.d/addresses.conf 
[Socket]
ListenStream=
ListenStream=0.0.0.0:1234
---
Test #4:

root@jammy:~# apt update && apt dist-upgrade -y
[...]
Setting up openssh-server (1:9.0p1-1ubuntu7) ...
Synchronizing state of ssh.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install disable ssh
Removed "/etc/systemd/system/sshd.service".
Removed "/etc/systemd/system/multi-user.target.wants/ssh.service".
Created symlink /etc/systemd/system/sockets.target.wants/ssh.socket → /lib/systemd/system/ssh.socket.
rescue-ssh.target is a disabled or a static unit not running, not starting it.
Failed to restart ssh.socket: Unit ssh.socket has a bad unit file setting.
See system logs and 'systemctl status ssh.socket' for details.
Could not execute systemctl:  at /usr/bin/deb-systemd-invoke line 145.
dpkg: error processing package openssh-server (--configure):
 installed openssh-server package post-installation script subprocess returned error exit status 1
[...]
Errors were encountered while processing:
 openssh-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@jammy:~# grep "^ListenAddress" /etc/ssh/sshd_config
ListenAddress 0.0.0.0:1234
ListenAddress [::]:4321
root@jammy:~# cat /etc/systemd/system/ssh.socket.d/addresses.conf 
[Socket]
ListenStream=
root@jammy:~# apt update && apt install openssh-server -y
[...]
root@jammy:~# ls /etc/systemd/system/ssh*
/etc/systemd/system/sshd.service