I own a cosmos elite with the wireless adaptor and I was able to turn on the camera with the elite faceplate , only in your HMD
If you double tap the left side botton on your HMD you can switch to the camera which are really low pixel , double tap again to go back on pc input , unknow if is from the last beta version (1.0.14.3 beta) or include in the regular version since i put the beta version for testing something with openXR just i can see what the camera see
Also forget about limited to HMD , I was able to see it on my computer screen if you go in your setting and see what you see in your HMD , you can clearly see the camera