OK, This is probably a dumb question because I am sure you did... I am going to guess that you have already had the Driver Manager in the settings run a diagnostic with a device plugged in?
I have found sometimes it will not find an issue unless a non-working device is already plugged in first before it checks. Some BIOS will not do this either, I had that issue with my ASUS.
Anyhow, I am off to town, catch up later. :)
Thank you for the time to share, Be good to make it work for you. :)
The Mint 20.2 Driver Manager runs a scan when you start it up and reports no drivers are needed. The system does not even know that there are 2 USB network adapters plugged in. I also tried Fedora (buggy) and Neon user (which offered more options) and Xubutu XFCE, plus fossapup64-9.5 - which actually is the most user-helpful - but still no configuration.
Now there are plenty of solutions that involve sudo apt update, but that itself requires a Internet connection and depends upon which basic flavor of Linux one is using, and which I could enable such as by bring the box to another room and trying each solution. However, there should be a simple single executable file (no complicating compiling) that works, that I could put on a USB and point Linux to - if it even would automatically detect the adapter. At least if Linux is to be promoted as "desktop ready."