Start Guide for download and upload a new game into the Oculus Quest 2 & 3
You can find all the patched apps for Quest and Quest in their own game topics.
In the game topics you can find download links for the games. Make sure to install latest 7zip or WinRar (Windows) or Keka unarchiver (MacOS) to extract the downloaded zip files.
So now that you have downloaded the game you like, you'll need a way to install.
From the zip archives you'll find apk and obb files.
apk files are the installer for the games and obb files are the game data files (assets and other stuff).