this is a big pain for me as well. So right now I still just run plex + jellyfin at the same time on my server. Locally, all over the house, I use apple tv with the Infuse app connected to jellyfin to stream everything which works perfectly, but I have family members and friends who stream from my media library outside of the house, and they all use the plex app. I’m not sure of a way to get them connected to my jellyfin library. If/when I can figure that out, and more importantly, make it dead simple for the end users, I’ll gladly close down the plex server for the last time ever.