HomelessCanadianplex or Jellyfin?
My experience with Jellyfin have not been great. The mobile app is just not working well enough
Plex has lots of customisation available (which I prefer) but is a little harder to get running in my experience. I’d say, install them both and see what you like most. Do start with Jellyfin as it’s easy to install.
OptimisticPrimeNot sure how long ago you tested it, but there is now an alternative Android app called Findroid which I like much more than the official app.