Not sure if this was mentioned before. But the Osmo can be controlled by attaching a lighting USB-C cable (I tested with an Apple OEM cable) from the USB-C port on the Osmo to the phone's lightning port.  

Hi, thanks for sharing this information, however, the process may not be guaranteed as we stated on our store that the Osmo Pro/RAW Wired Video Adapter cannot be used with iOS devices due to iOS system limitations. Thank you for understanding.