I am experiencing the same issue (aur wifi driver not working and freezing the desktop to an ugly grey) on a desktop pc with kernel 6.1.66. dkms loads this driver GitHub - RinCat/RTL88x2BU-Linux-Driver: Realtek RTL88x2BU WiFi USB Driver for Linux Updating this / re-installing did not solve anything.
BTW On Arch the same update caused the same problems.
I have rolled back the update with timeshift and not sure what to do next.
edit: see this topic: Several problems after 2023.12.10 Stable Update - #3 by Wollie
edit dec 12 21:00 CET: redone update, kernel 6.1.66-2: wifi is now OK!