I've found the same thing in my efforts to do the same.

I'm trying to find a way to connect to a PEAP-authenticated WiFi network on the Omega2+. I've searched and found: https://wiki.onion.io/Tutorials/Connecting-to-Enterprise-Secured-Wifi (I'm actually also trying to connect to eduroam) and https://community.onion.io/topic/27/wifi-wpa2-eap-peap-mschapv2, but both of these seem to have been written for the original Omega, and don't seem to use the ApCliSsid, and associated things in /etc/config/wireless.

Any help appreciated!