A feature that automatically resets permissions and clears temporary files for apps you haven't used in months to save storage and improve security. Installation & Update Methods

It’s possible you’re referring to one of the following:

: A developer-focused tool that allows users to install a Generic System Image (GSI) of Android 12 alongside their current OS without overwriting data.

There are several ways to get "Installer V12" on your device, ranging from official updates to manual sideloading. Get Android 12 - Android Developers