iOS 15 update to fix Apple Watch unlock bug is here
 

If you've had your iPhone set up to unlock with your Apple Watch and recently upgraded to an iPhone 13, a software bug may have prevented you from continuing to use this. Thankfully, a fix is here and once you install it, you shouldn't have to resort to Face ID (or worse, typing in your passcode) anymore. The latest iOS 15 update (iOS 15.0.1) is here and according to the changelog, it brings bug fixes "including an issue where some users could not unlock iPhone 13 models with Apple Watch."

https://www.engadget.com/ios-15-fix-...9.html?src=rss