You rock! The Jellyfin Android TV app on a LineageOS-Pi4 is my current preferred way of bringing Jellyfin to my TV. I tried messing around with Kodi-based solutions for a while but if you don't like the default behaviors there then it's an absolute nightmare timesink to reconfigure. AndroidTV Jellyfin client - install, open, everything is in its place already.
A quick note - one of the updated components used during music playback has caused the Amazon release to fail testing. Fire OS devices will remain at the previous version for now, and a bug has been opened with Android/Google.
