The question is, where should album art come from? The best is to use playlist as album, where you can organize the songs. It is possible to re-construct the album from track metadata, but it lacks album art through, could take the first track, or combine 4 in a square?
Discussion
Uff I don’t know about actual technical solutions :) I’m just exploring music streaming options on Nostr. But I’m sure you’ll come up with a solution one day :)