I wonder whether you could achieve USB3 transfer speeds from a computer to a usb3 iPad Pro with the Camera Adapter and a usb A to A cable like this:

https://amzn.eu/d/37zSB6e

That adapter acts like usb host IIRC. So does your computer. Connecting two hosts with a A-to-A cable is not going to do anything good (and might cause harm). This is why A-to-A cables aren't supposed to exist as per usb spec.