My iPhone 7plus does not pair with my Apple 9 watch
When pairing watch to iPhone 7 Plus it starts then says can’t pair.
Windows, Windows 6
Question marked as
The iPhone 7Plus cannot update further than iOS 15 series. The watch series 9 needs an iPhone With iOS 17 in order to be able to pair.
I am sorry that this information was not known to you sooner.
See this user tip I wrote about this subject for further reference
watchOS and compatible iOS versions - Apple Community