Final answer:
To check WiFi data usage on Android 12, open Settings, go to Network & internet, select Data usage, and view the list of apps using data.
Step-by-step explanation:
To check WiFi data usage on Android 12, follow these steps:
Open the Settings app on your Android device. Tap on 'Network & internet'. Select 'Data usage'. Scroll down, and you will find a list of all the apps using data on your device, including WiFi data. You can tap on each app to see more detailed information about its data usage. There is also an option to set a data usage limit and receive a warning when you approach that limit.