Comment 4 for bug 1925219

The installer also does not recognize previous LVM partitions.

Did two tests:
1)
a) Let first flavor do 'Entire disk' install with LVM selected.
b) When installation completes, reboot with second flavor iso.
c) Installer does not recognize the first install's LVM partitions and hence does not offer to resize or install alongside.
d) Choose 'Something else', we can see LVM partitions which can be re-used (overwritten) to complete installation.

2)
a) Booted with first flavor, create LVM partitions but only on half of total disk size (e.g., 15G of 30G).
b) Choose 'Something else', we can see lvm partitions, complete installation.
c) When installation completes, reboot with second flavor iso.
d) Installer does not recognize the first install's (manually created) LVM partitions nor the free disk available and does not offer to resize or install alongside.
e) Choose 'Something else', we can see the LVM partitions and the free space, choosing either of them (i.e., either overwrite on LVM or install on free space to get dual boot), we can proceed with installation.

So, the install side-by-side (auto-resize) does not work with previous,
a) encrypted partition
b) ZFS partition
c) LVM partition