I've heard of this happen a couple of years back, but can't find a way to pair the watch series 7 back to iPhone. Would appreciate remedy if you know or have had this happen. to you. Thnx.
Apple Watch Series 7, watchOS 11
Which iPhone do you use?
If your watch has watchOS 11 installed, your iPhone has to have iOS 18.
This article has some troubleshooting tips, if your iPhone already has the latest version of iOS 18 installed:
If you can't pair an Apple Watch with your iPhone - Apple Support
Apple Watch series 7 unpairs
