Far from perfect, but #ChatGPT can be helpful faster than #Radxa support.
I got some Radxa Rock 4B+ boards with AW‑NB197SM WiFi module and turns out it was some custom batch or smth.
So they removed support for this module in Radxa OS r4 and onwards, though it works on r3.
Also WiFi works great on #DietPi and #Armbian, so not a hardware fault.
After fiddling for quite a while ChatGPT made me a shell script that fixes - feel free to use it: https://github.com/in-sympathy/radxa_rock_4bplus_wifi_fix

