It seems you are having issues with updating your Apple Watch, follow along with these steps.
When updating your Apple Watch:
- Your iPhone is updated to the latest version of iOS
- Your Watch is at least 50% charged
- Your iPhone is near and connected to WiFi.
Important: Keeping your iPhone near the Apple Watch is important because this could determine whether the update takes a few minutes or a couple hours.
If you are stuck in the update, try force resetting your Apple Watch, and your iPhone if needed.
- Apple Watch: Hold down the side button and the Digital Crown at the same time for at least ten seconds, until the Apple logo appears.
- iPhone: Press and quickly release the volume up button, press and quickly release the volume down button, press and hold the side button, when the Apple logo appears, release the side button.
Still not updating?
Contact Apple for more support.
For more information: Update your Apple Watch - Apple Support, hope this helps!