Awesome, this is the main piece of puzzle I (or rather: my wife) miss from Nextcloud (the default Photos has terrible performance and lacks some features). Gonna set it up. Also nice to see Face Recognition app is used. Now I'm gonna have to edit my docker-compose.yml for the dependencies but that is fine.
Also, I've been trying Photoprism and also I tried Immich in past. They have disadvantages: they don't sync with whatever got uploaded to Nextcloud and they either do not have a mobile front-end or it is some web app. They also have stability issues, though I had most success with Photoprism.
I suppose it won't be as useful to me as it could be as I'm stripping all EXIF data from any photo uploaded by Nextcloud because I fear my wife stupidly just shares whatever when she should not. Yes, I know you can do OSINT analysis anyway, but that is a skill as of yet.