Finally, we can play VR on our couches. The entire reason VR is popular (moving away from the couch and seat-based gaming experience) has been reversed. Now I can sit down on a soft seat and wildly swing my arms around.
A new feature of the Oculus Quest Guardian system has been added in the new v26 update for the standalone headsets. All you need to do is draw the outline of your couch in the same way you draw the boundary area. Using camera pass through you touch one side of your real couch and drag a blue rectangle across to the other end. This creates a 3D representation of the couch in Oculus Home.
The couch will be the same for everyone, a standard back 3D model that is scaled to the size you drew in the pass through camera. You can only see the couch in Oculus home and is you are in an app or a game it will be represented by a basic blue rectangle and act as another warning for players to not bump into anything. If you want to move from room scale VR to a seated mode, you can select a system popup asking you to confirm Couch mode.
You may not have this update at the time of writing because Facebook generally rolls out their updates over a few weeks. So, stay patient and you will get the update. It is also an experimental feature so when the headset has finally updated, you will have to manually select Couch mode by going to the Experimental Features tab of Settings to find it.