Apple watch SE won't accept ID Password
How do I get my watch SE to accept my new Apple ID password? It has been changed successfully on all my other apple devices.
Question marked as
Unpair it - then set it up again. It should take the new password to unlock on un-pairing it but be prepared to use the old one
Unpair and erase your Apple Watch – Apple Support (UK)
Set up your Apple Watch – Apple Support (UK)