I had the same issues on Windows 11 as well. After a windows update wifi network card just suddenly stop working.
My laptop comes with Killer AC 1550i wifi card and I tried pretty much everything online and the support page, but no matter what I done it's just keeping have issues.
The Device Manager shows the device cannot be started. Error code 10.
I even boughta new wifi card Intel AX210 and the same issues still happens. That makes me think this is not a driver or laptop problem. This is a Windows 11 problem.
I find that reinstall EC firmware can sometime fix the issuse, but it will not last long.,wifiI will keeps dropping off and then stop working eventually. I really don't want to reinstall Window. :(