Archer TP-link AC600 T2U

You are correct, I am on 5.10.

Very weird, Balena Etcher USB sticks stopped working. Ended up having to use Ventoy to get the thing to boot the USB install stick .

OK, looking through the instructions here:

They are for a pi3. The instructions state that modifying the kernel will be different fir different pi s. I am guessing that is the case here?
Also the download location for the kernel downloads is deprecated.

Any idea how I go about updating the kernel module?