I can’t pair my iPhone 12 max pro with my I watch
Thanks for coming to Apple Support Communities for help today pairing your Apple Watch to your iPhone 12 Pro Max. It sounds like this may be a new iPhone and an Apple Watch you previously were using with another iPhone.
Have a look at this article: How to pair your Apple Watch with a new iPhone.
If the article doesn't resolve the issue, let us know further details.
Have a fantastic day!