Help me to connect my Apple Watch 7

Then you should try the troubleshooting mentioned in the related article from above.

Any error messages given?

To which iPhone model and iOS are you trying to pair your Apple Watch?

Your iPhone might need to be updated to the newest iOS 16.3.1, before you can pair your Apple Watch.

If your Apple Watch has been connected to another iPhone before, unpair it and connect it after that to your current iPhone. This article has all the details:

Unpair and erase your Apple Watch - Apple Support

You may have to disable the Activation Lock before:

About Activation Lock on your Apple Watch - Apple Support

This article has more troubleshooting tips, in case you can not pair it:

If you can't pair an Apple Watch with your iPhone - Apple Support

You're welcome 🙂