What if you run getprop instead?
adb shell getprop debug.oculus.experimentalEnabled returns 1 for me. Are you on v34 and is your Passthrough working OK ? I tried turning Space Sense on and off but didn't change Passthrough for me.
Also posted a thread here to get wider input - https://www.reddit.com/r/OculusQuest/comments/qleyvi/v34_passthrough_api_stopped...