Apple watch

See if this helps...........https://support.apple.com/en-us/HT205025

If not, click on the "Contact Support" link at the upper right side of yhis page and speak with an Apple Specialist.

Did you update your Apple Watch to watchOS 6?

Do you have an iPhone 6 or older?

I'm just guessing. But watchOS 6 requires iPhone iOS 13, and iOS 13 ONLY runs on the iPhone 6s, SE, 7, 8, X, XS, XR, 11 and 11 Pro, including the associated "Plus" or "Max" models.