UR22C DSPMixFX-C and ios


I have just purchased a UR22C and set it up fine on a Mac.

I am having problems on iOS with an iPhone 11 and also an iPad Pro in that although connected with 5v power supply in micro usb and also usb-c to lightning in upper slot the usb light continues to flash.

Also no driver is shown in DSPMixFX-c on either device and it’s not being recognised as a new audio device on iOS.

Do I need the lightning to camera connector? I was expecting that the 5v supply could be used for power and the usb-c just for data On iOS?

Am I wrong?