I have the same problem - I’m attempting to connect a StudioLogic Numa Compact 2 (NC2) to Cubasis LE3 connected via the apple camera adapter USB to an iPad Pro with ios 13.4.1. Cubasis works ok and responds to midi to and from the NC2, but stays stuck in demo mode as it (apparently) doesn’t recognise the NC2 as a compatible hardware device, even though it is listed in the compatible list.
Can anyone help? I noticed a couple of private messages in response to earlier cries for help.