how do I set up Thunderbolt connection that supports external ethernet

Thanks for the response I am using an Apple 1M TBT-3 cable and it gets a solid connection. The problem is that the MacOS says there is nothing connected to the cable and the iPad says there is nothing connected to the cable also but it seems to be getting data at high speeds going back and forth. There is no way to tell if there is even a connection on the iPad side of the connection. I am also having concerns that there is a reliance on the WiFi connnection even though it should not be used if a faster connection is available.

i am aware of all of that as I have been working with Thunderbolt 3 with Intel platforms for over 2 years. I am relying on the Thunderbolt because of its innate speed and the fact that the Thunderbolt connection was advertised as being available on both the iPad Pro and mini-Mac platforms that i am using for building and testing the source code package I received from a contractor. I am using one of the two type C connectors on the Mini-mac and data seems to be going across. There is also an indication that the iPad Pro is in the device list when i have it connected even when i turn OFF the WiFi connection. When i look at the status info in the device list from "system information" it explicitly states that nothing is connected to the port on the Mini-Mac side of the cable and there is nothing that reports the status from the iPad Pro side. I am using Xcode to do the build on the Mini-Mac and the download transfer seems to be working (The presence of the app icon in the target system would say the app file was indeed transferred) but the iPad Pro says it cannot maintain a network connection to the Mini-Mac to get the security validation from the build machine. I can only presume that it is not communicating with the Mini-Mac over the same connection that the programme was sent to the iPad Pro.

The device IS configured to run in Development Mode. The problem is that there is no recognition detectable from the iPad for the connection. the iPad does show up in the list of devices connected when the Apple Thunderbolt (i tried two different ones) or any of the four other cables from vendors of Thunderbolt cables is tried.