Google has announced its Android 12L update — the one designed to give its OS a better experience on tablets and large folding phones.
With Android 12L, Google is adding a two-column layout for devices with larger screens, which will let you get at more information at once. For example, your quick settings and notifications can display side by side. Google’s also working to improve multitasking, letting you drag an app into split-screen mode from the taskbar (which you can also use to quickly switch between apps).

Three methods to install the update are:
Method 1: Sideload Android 12 Beta via Recovery and ADB
Method 2: Flashing full Factory Image via Fastboot
Method 3: Install Android 12 GSI
Prerequisite :
Commands :
- fastboot flash boot_a boot.img
- fastboot flash boot_b boot.img
- fastboot -w flash system <your Treble ROMs name>.img
- fastboot –disable-verity –disable-verification flash vbmeta vbmeta.img
- fastboot reboot