I spent an hour exploring the AI-generated music site Suno and found quite a few of their artists’ releases on TIDAL and Qobuz. The most recently updated AI artists compiled on Zoundhub are also available on TIDAL and Qobuz.
So, I would consider it widespread and a problem to rein in if you want to completely ban AI-generated music from the streaming services Roon offers.
For now, the simplest way I can think of to handle the situation is to give a thumbs-down if Roon Radio queues up a track with AI-generated album artwork. That is usually a dead giveaway until AI figures out how to improve upon it.