iPad Pro (USB-C) as a USB Send Effect DJM-900NXS2

Hi there

I'm trying to connect my iPad Pro to the 900NXS2 mixer using the USB Send however it is not recognising the device. 

I'm on the latest Firmware (2.07)

I've tested the the port with the latest and previous gen iPad Pros and it doesn't work, however it does recognise my iPhone Xs Max

Any ideas?

Cheers!

David