The script simply check whether ip l lists any WiFi interface. If none is there, the driver for this chip has not loaded (correctly), or other low level issue.
We seem to have the same issue on Orange Pi 5 Plus with 6.1 vendor kernel: Orange Pi 5+ should we have switched kernel? - #7 by b9AcE
Did anyone succeed to get another M.2 WiFi module to work on Radxa ZERO 3? I am wondering whether it is chip-specific or a general issue with mainline Linux and even Linux 6.1. As I mentioned over there, for mainline kernel, an additional device tree node seems to be required to get it working. In case of OPi 5 Plus, it is however the vendor kernel.
Same error has been reported on several other places, even Radxa forum: Wifi not detected - ROCK 4 Series - Radxa Community
So it could be also some chip-specifc issue.