Official comment
@Maury > Sorry, but the WeGO3 was created prior to the USB-C connections of the iPad Pro, and as such, it's great that the USB-C-to-USB-B cable works, but as that port does not provide power to the iPad, it won't charge while being used. Unfortunately I don't know if there is a cable option which may provide power to the iPad while allowing the data communication to the controller.