OR Google released biometric authentication by automatically completing login credentials on Android. The Android has the ability to autofill Google for a few years now, but the application was not as secure as the Google never asked for biometric verification or a password before filling in the details.
So one could easily use the autocomplete feature to connect to applications and services on an unlocked device.
The function is hidden in Settings
Here, you will find the option of switching biometric authentication for login credentials, although it is enabled by default on the Galaxy S20 +.
Here is a quick video from Android Police presenting the function: