From visionOS 2.0 we can access Apple Vision Pro's main camera but only for Enterprise account as it is enterprise API only, I have a normal Developer account and I want to use main camera and want to have a video call feature in app by using main camera of AVP, is it possible to do it using developer account only. Currently using that account I am not able to create entitlement certificate as there is no option.
Access main camera on Apple Vision Pro
There is no way to access the main camera outside of enterprise apis for visionOS. However, your use case sounds like a good fit for SharePlay. Have you considered using the Group Activities framework? It enables shared experiences over FaceTime.
Here are some resources to help you get started: