I have the same issue here as well. I have a Microsoft Laptop 3 with a Lenovo Gigabit USB ethernet adapter. I upgraded to Win 11 2-3 months ago and I have been having this same problem. With Win 10 over the past 3 years no issues at all with the ethernet adapter.
It has to be related to the OS, but having followed all the the advice above, except a fresh install of Win 11, the problem still persists. Is it just a coincidence this many people are having similar issues?