Forgot my Apple Watch password , now cannot pair the watch with my phone
How to reset Apple Watch password and pair it again to my phone
If you forgot your Watch passcode -
https://support.apple.com/guide/watch/if-you-forget-your-passcode-apdbebcd1d3b/watchos
M1 Mac mini, macOS 11.5.1; Watch, series 5 GPS/cellular, watchOS 7.6.1; iPad Pro 2nd Gen, iPadOS 14.7.1; iPad Air 2, iPadOS 14.7.1; iPhone 12 Pro, iOS 14.7.1; TV 4th Gen, tvOS 14.7 HomePods, audioOS 14.7 and Airport Express w/ Airplay 2