There’s a few out there that are pretty decent. I actually use two at the moment but will consolidate eventually.

Been using Librephotos for a while now: https://docs.librephotos.com - tried a few but landed on this one not for any real technical reasons, I just like the interface and it’s easy manage.

I also use https://immich.app - I started using it as a simple way to backup my families phone photos but it’s on such a furious development pace that I’m pretty sure it’s going to replace librephotos for me as well someday.