Not sure about Lemmy. The best resource is XDA-developers forums

I was tuna shamed in school because that’s the only sandwich my mother ever put in my lunchbox.

If you use anything by the monopolist assholes, you can totally expect to get enshitified. I swtiched over to Tidal a while back. They support artists, not hate speech. And the audio quality is better.

Most apps have export import capability. For instance, i use both Clementine and Rhythmbox on my desktop. I export the playlists in m3u format. Then sync the whole shebang to my Jellyfin server in the cloud. Jelly finds the playlists and adds them. Then use Finamp or Jelly app on my phone