A bit different, but same problem here too!!
My iPhone 11Pro worked well, till I upgraded to iOS 15 a few days ago. Since then, it won’t pair anymore, and the Bluetooth connection with any sound system (i.e. Creative Stage soundbar) fails every time.
I really hope that this problem will be soon solved out! Good luck to the Apple specialists!
DiaB
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution