Pico 4 Passthrough Mode Indication?

Could I get any current owner of the Pico 4 to check something for me?

Is there any indication from the outside of the headset when passthrough mode has been turned on?

Quest pro has an LED, and for most steamVR headsets, the steam Dev console reports when the room view camera has been enabled. I don't believe Quest 2 has any external indication (even when air linking), but might be wrong about that.

Does Pico 4 have a pass-through LED? Or does anyone want to see if it behaves similarly in steamVR for me?