Google Pixel Watch 3
Turning Wi-Fi on or off
You can use Wi-Fi as an alternative to the mobile network when establishing an internet connection. This way your smartwatch doesn't use mobile data.
Slide your finger downwards starting from the top of the screen.
Press the settings icon.
Press Connectivity.
Press Wi-Fi.
Press the indicator next to "Wi-Fi" to turn the function on or off.
Press the crown to return to the home screen.