Ensure both your TV and your Quest 2 are connected to the same Wi-Fi network. With your Quest 2 headset on press the Oculus button on the right-hand controller. That’ll bring up the menu. Then click the white arrow in the pink box. Click on cast on the top left of the next menu that appears. The find the relevant TV in the list of devices. You might need to then confirm the connection on your PC Double tap your heads to activate pass through to find out or take the headset off to confirm. Enjoy!
Click the Oculus button on the right-hand controller. From the menu click the share button. Click the cast button and click to stop casting. Alternatively, just hold the power button on the headset and click to power it off.