My volume control stoped working on my Siri remote
I can’t unpair my Siri Apple TV remote
Apple TV 4K, tvOS 15
Question marked as
There is no unpair procedure, but you can restart the remote and/or pair the remote again regardless.
If your Apple TV remote isn't working - Apple Support
Let us know how that goes.
Try a 2nd or 3rd time if needed, as one user reportedly had to. Else contact Apple Support.