Apple passcode on apple watch Ultra
My friend has my watch. Can I change its passcode from my iPhone or MacBook Air?
Apple Watch Ultra, watchOS 9
My friend has my watch. Can I change its passcode from my iPhone or MacBook Air?
Apple Watch Ultra, watchOS 9
Absolutely not, otherwise he could do the same to yours.
If he has forgotten it he will have to follow the steps in this article
If you forgot your Apple Watch passcode - Apple Support
Apple passcode on apple watch Ultra