https://wccftech.com/pixel-6-pro-users-might-finally-get-face-unlock/

For those who do not remember, the Pixel 4 launched with a face unlock feature that was marketed as a more secure way of unlocking your phone. However, the Pixel 4a and the 5 debuted with a fingerprint sensor. It has been a few months since Google launched the Pixel 6 and Pixel 6 Pro and sadly, the face unlock feature was missing from the phone. However, there is now a hint that the feature might be making a return in a future Android build.

A Redditor managed to find the face unlock option while setting up a Pixel 6. The user has reported that the face unlock choice appeared when you have to choose a screen lock; basically, the screen lets you choose from various methods of unlocking your phone. The "Face" option showed up with choices such as password, Pattern, or PIN. Sadly, the user was not able to use the feature or find it in the settings later. What's odd is that the feature appeared in a stable build of Android 12 rather than a beta build.