Comment by pzmarzly
eduroam is not your everyday WPA{2,3}-PSK, it's WPA2-EAP. There are official shell scripts to provision certificates, but they only seem to work on major distros, and for some reason the eduroam website made different scripts for every university. Also, for most people this is their first (and last) experience with 802.1X, especially setting it up themselves.
In my experience few years ago, it was a pain to set it up on everything except macOS and iOS (which come with eduroam certificates preinstalled in their trust stores).
But then it would suck equally as much on any other Linux distro, NixOS has no relevance here.
(I have also suffered from tying to connect to eduroam on Linux laptops).