Wifi module not installing for Orin NX 16GB Jetpack 6.0 reflash

I have a J4012 (Orin NX 16GB) which was previously flashed with JP5.1.1 as its factory default but I wanted to upgrade to JP6.0. To do this, I followed the instructions on this page Flash Jetpack | Seeed Studio Wiki

and everything worked until the last step, installing the wifi module. I am using the same Intel AX200i which was working for the Jetson before, but when running the last command “sudo apt install -y iwlwifi-modules” I get the error message “E: Unable to locate package iwlwifi-modules”.

Does anybody know how to work around this issue? Thanks in advance!

Zhifei