I’m on 3 different private trackers and they’re great for shows and movies. Not so much for music.
To be clear, I’m unambiguously NOT interested in inviting anyone to the private trackers which I have invites for because that is explicitly against the rules and I always follow all rules to the letter. Feel free to private message me. Or message me on Signal
Lidarr+arr-scripts has some things that fill in missing albums from deezer and YouTube music.
I’ve not found a good torrent tracker for music but drunkenslug with usenet has a good amount stuff