How can I make my Apple Watch appear in Find My?
Apple Watch does not show up in find my app. How to fix?
[Re-Titled by Moderator]
Apple Watch Series 8, watchOS 11
Press the crown once, tap on Settings, your name should be at the top, tap on that and it should show the email of your Apple Account.
If it does, try restarting the phone and the watch.
If it doesnt, try signing in, or preferably use the phone Watch app to unpair and set up again from your backup.