Theoretically, it should work with the use of an ethernet adapter, But please note that this feature has not been fully tested yet. so it may or may not work on some devices.
Another option that you can try is by using USB tethering on your iPad Pro, provided that the device supports it.
please check the chapter “Troubleshooting -> Network Connection” in the user manual https://forum.spacedesk.netuser-manual/#item_489.
FYI: native iOS USB cable support is expected to be available in late 2023.
We have just released a new spacedesk Windows Driver v1076 and spacedesk iOS viewer that includes support for USB iOS.
Please update your Driver and Viewer to the latest version. Please try it and let us know if this works for you. Looking forward to your feedback!