To clarify, when you turn the camera on during the preview, do you see your camera on (your image) or is the camera off even though you set it on?
--- Yes, when i turned on camera during the preview, I could see camera on image.
Sidhu when you join the session, can you check your camera settings on the top center. There are two options there that would hide it. Hide everyone or by turning off Show me my camera. I tested this on my side and do see my camera on the preview, but not when I join after disabling Show me my camera.
If you still don't see your camera, can you PM me (tap on my username then Message Me on the top right) screenshots? The permissions should be updated now to allow that.
