Did you ever figure this out? Just upgraded to Big Sur, having the same issue with the same device - I am assuming it is because the Archer drivers aren't compatible with Big Sur and that the company (TP Link) will have to update their drivers before it will work again. Is this not the case?
JennFerr
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution