Q: pairing apple watch

So are you trying to unpair your Apple Watch?

If so, help here >    Unpair your Apple Watch and iPhone - Apple Support

Hi

To turn off Mark as Missing and unpair your watch in a way that ensures the removal of Activation Lock, follow these steps:

• Re-pair your watch with your iPhone:
  • If necessary, first manually erase all content and settings on your watch:
    • On your watch, go to: Home screen (via a single press on the Digital Crown) > Settings (cog icon) > General > Reset > Erase all Content and Settings.
  • Then pair your watch via the standard set up process, choosing to Restore from Backup when offered the option:
    • Set up your Apple Watch - Apple Support
• Then unpair your watch as you originally intended to do, by tapping on Unpair Apple Watch within the Watch app on your iPhone:
  • Unpair your Apple Watch and iPhone - Apple Support

More information:

About Activation Lock on your Apple Watch - Apple Support