On the headset, stop playing — open the menu with Y, or pause — then hold this screen facing you, upright, about 30 cm away, and keep it still for a few seconds. Flat on a table does not work: the headset has to see the code square-on, not at an angle. Turn the phone's brightness up if the room is bright. The headset looks for a code whenever it is not playing and reads this one by itself; the bar at the top of its view says what it sees. If it asks to allow Spatial data, say yes: that is the permission the code is read with.