If your camera won’t connect to Snappic, check and adjust the settings on your camera as needed:
Set the [Choose USB Connection App] camera setting to Photo Import/Remote Control
Ensure the USB C cable is a data transfer cable, see recommended USB cables
Disable [Network Settings] on the camera (wireless connections can interfere with USB tethering)
Disable [Bluetooth Settings] on the camera (Bluetooth can interfere with USB tethering)
Update the camera to the latest firmware
Update Snappic to the latest version
Update iPhone/iPad to the latest IOS Software