Why can’t I download watchOS 9.1 on my iPhone 11 even when it’s connected to wifi?

Hello bawi227,

Welcome to Apple Support Communities!

We want to help get your Apple Watch updated to the latest version.

We see you viewed the Apple Support page for About the security content of watchOS 9.1 - Apple Support

Try these steps if you've having issues with the update:

"Need more help with updating?

Try these steps:

1. Make sure that your Apple Watch is connecting properly to its charger. 
2. Restart your Apple Watch.
3. Restart your paired iPhone.
4. Try again to update your Apple Watch.

If the update won't start:

1. Open the Apple Watch app on your iPhone.
2. Tap General > Software Update.
3. Delete the update file.
4. Try again to update your Apple Watch.

Learn what to do if you see 'Cannot Install Update' when updating Apple Watch or if your Apple Watch says you need more available storage to install a watchOS update."

This Apple Support page has the full details and additional steps to take to help get the Apple Watch updated: Update your Apple Watch - Apple Support

Cheers!