Same. One of my apps has been waiting for review sind Sept 30 now while another one got reviewed within a few days in the same time span. Not sure what to do. I've got a couple of users waiting for it.

I’ve done this and you usually record a video showcasing the app together with the device. There are some guidelines on how to do this somewhere.

You should probably watch the WWDC23 sessions for spacial computing and ARKit. You can have to types of interaction with the room you're in: plane detection and scene reconstruction. For the first one you get information about horizontal and vertical planes detected by ARKit and you'll be able to anchor virtual content to these planes. For the second you get a more detailed mesh of your surroundings and then you can work with that. So, yes, your use case should be possible with these features/techniques.