The passenger cabin can be accessed from the cockpit view using the keyboard arrow keys to move the camera UP/DOWN/LEFT/RIGHT. The camera can then be moved FORWARD/BACK by holding LEFT ALT and using the UP/DOWN arrow keys. Press the "F" key to reset the camera back to the default pilot position. Alternatively, you can access several pre-set cabin camera positions using the MSFS Camera menu.
Users with an Xbox controller can press and hold LB followed by moving the two thumbsticks to walk to and view the cabin.
If the passenger cabin appears invisible, please ensure that the INTERIOR CABIN option is enabled in the Configuration Menu on the EFB Aircraft page.