Wired
The screen of the smartphone can be automatically switched between landscape and portrait according to the orientation of the device. However, when you are using your smartphone while lying down, you may find this function annoying. With Google Pixel running Android 12, such stress may be eliminated by the automatic rotation function using “face”.
Recognize face orientation using front camera
The ability to automatically switch the screen between landscape and portrait by changing the orientation of the smartphone is especially useful when watching videos.
However, this feature works regardless of the posture in which the human is using the smartphone.
For this reason, many people may have experienced that the screen is oriented in the opposite direction to the orientation they want to use, such as when using a smartphone while lying down.
Android 12 seems to deal with this problem by recognizing the orientation of the face using the front camera.
By determining which orientation the smartphone is facing with respect to the face orientation, it is possible to always rotate the screen in the orientation required by the user.
This will allow you to always rotate the screen in the direction the user wants, even if you are lying down and using your smartphone.
Only for Google Pixel?
This function seems to be usable on all Android smartphones in principle, but it seems to be implemented as a function only for Google Pixel.
Android 12 is also said to add improved split screen features and privacy features like iOS 14.
Source: 9to5Google
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Source: iPhone Mania