Hello JuniorMints48,
Welcome to Apple Support Communities. If you're having trouble updating via the companion iPhone, try doing so directly on the Apple Watch. Get started with the steps here:
"Update directly on your Apple Watch
If your Apple Watch has watchOS 6 or later, you can install subsequent updates without your iPhone:
- Make sure that your watch is connected to Wi-Fi.
- On your watch, open the Settings app.
- Tap General > Software Update.
- Tap Install if a software update is available, then follow the onscreen instructions."
Further guidance to get the Apple Watch updated can be found in the Apple Support article:
Update your Apple Watch - Apple Support
Let us know if you have any questions.
Have a great day!