I can only speak on the 11 not allowing preview while recording. I went from a 9 to 11 and can assume that means the 10 doesn’t either. The 12 may? But I feel like someone would have mentioned it by now and I haven’t see anything on it.
Yep, it's on GoPro Quik. Make sure both your Quik app and your camera are up-to-date. Not sure whether there are differences between Apple and Android, but it's available on iOS. You connect to the camera with Bluetooth, then Enable Preview (connect via WiFi), and when you begin recording, it continues showing the Preview (what the camera sees)
I can only speak on the 11 not allowing preview while recording. I went from a 9 to 11 and can assume that means the 10 doesn’t either. The 12 may? But I feel like someone would have mentioned it by now and I haven’t see anything on it.