Software Update Apple Watch Not Working. With watchOS 6 compatible with Apple Watch Series 1 and later and iPhone 6s or later running iOS 13 or later you can update software right from the Apple Watch. The version is in the beta mode of testing.
A green icon that looks like an iPhone means your Apple Watch is connected to your iPhone. After you delete the file try to download and install watchOS again. If the update wont start open the Watch app on your iPhone tap General Usage Software Update then delete the update file.
If an update or software installation fails on iPhone you can plug the device into your computer and fix it using iTunes.
Ensure that your Apple Watch is connected to Wi-Fi. Update watchOS Directly from Apple Watch. This Wi-Fi symbol is the same as the first button on the control panel which should be highlighted in blue. On your watch tap Settings General Software Update.