It's safe to say that the release of iOS 15 could have gone a bit better. It wasn't the roughest iOS update to date, but it wasn't the smoothest, either. From large annoyances to small ones, the new software had a few bumps in the road. Like, for instance, for Apple TV owners who cannot stop getting keyboard notifications on their iPhone.
iOS 15.1 makes it possible to disable Apple TV and Watch keyboard notifications again