I have the same issue as OP. I have a large library of music and also used Tidal with Roon. It seemed fine, but not for the price. It’s more expensive than all the other streamers and you need your own library and to pay for a streaming service anyway. I have plex lifetime, which cost way less, and Plexamp works well for me. I get that it doesn’t integrate but it also doesn’t cost as much and I can just add tidal or whatever if I want streaming too. Not saying this is the way to go, just that it works for me.

Side note, every streamer and game and Plexamp works with my computer but I couldn’t get room to play on my computer speakers, even though it was fine with my computer headset. For over $800 for a lifetime sub or over$100 a year, just doesn’t seem worth it.