Android 12L rolling out to Google Pixel phones

Android 12L is a special drop that makes Android 12 even better on tablets and foldable devices and it is now available on Pixels phones

Google has confirmed that the March update of smartphones from the Pixel line is based on the Android 12L code. The problem, however, is that these devices are neither foldable nor tablets, so main features are not available on them.

more:
https://developer.android.com/about/versions/12/12L