Nextcloud released a new version of their photos app a few days ago (https://nextcloud.com/blog/announcing-nextcloud-hub-3-brand-...). Haven't had the chance to try it yet though
Nextcloud will soon be at version 25, which will also be named Nextcloud Hub 3. Frank Karlitchek talks about this during the Q&A, about an hour and a half into the video linked below.
However there are major improvements coming in that new version, specifically to the Photos app[1]