Curious to know if you experienced the same issues as I have:
No because the issue has been updated in OMV and the install script since you installed. The install script is what adds the user running the install script to the ssh group. Since Debian 12 (not OMV) changed the ssh group name to _ssh, we just need to tweak things. I don't see this as a big issue either way since the user's groups can be fixed in the web interface.