In case you already input your 2FA codes from this article and the code still does not work, therefore you need to do this step for your workaround.
Open your Google Authenticator app and click this 3 lines menu
Look for menu Settings.
And then tap Time correction for codes.
Last step, tap Sync now and the app will start sync the time. Once finished, a notification windows will appear and give a message "Time Already correct".
Now start to use your Google Authenticator again and see if this can help.
