Quest is now compatible with Xbox Cloud Gaming, however, players are required to have their own gamepad. - Road to VR
Xbox Cloud Gaming Comes to Quest, But You’ll Need Your Own Gamepad
Meta and Microsoft have partnered to bring Xbox Cloud Gaming and the Game Pass library to Quest. With a Game Pass Ultimate subscription and a supported gamepad, Quest users can now play a wide range of flatscreen games on a virtual screen. The Xbox Cloud Gaming app is available for Quest 2, Quest 3, and Quest Pro, allowing players to access the majority of the Game Pass library instantly without the need for installs. However, Quest's own motion controllers are not compatible, so a supported gamepad is required. While it offers a unique gaming experience, users should consider the lower resolution, battery life, and the need to wear a headset compared to other devices. The Xbox Cloud Gaming app on Quest is currently in beta. For more information, visit the source article on Road to VR.
Source: https://www.roadtovr.com/meta-quest-xbox-cloud-gaming-game-pass-launch/