- Edited
Agathorn Seems that unfortunately you were totally right. DeoVR said the same thing on their blog, they made some comments regarding passthrough:
Viewing passthrough content from DeoVR on the Vision Pro is not possible yet. It simply shows a black background, and the video quality can't be changed from the default of 1920p. This is because Apple does not give access to AR. It can not be enabled, even in the settings. However, as soon as they enable it in an update of the Vision Pro OS, it will be enabled automatically for all DeoVR users - there will be no need to release an update.