For me, before I canceled, about 20% of the weekly "Release radar" list was obvious AI slop, with zero indication that it was happening and no way to opt out.
It probably depends on which discovery channel you're using and whether the recommendation algorithm has you pegged as someone willing to try new / less popular bands. But it's definitely an issue on the platform. I never sought AI content and always diligently downvoted it, and it would still keep showing up.