With respect, this is an install helper for steam deck / linux kinda topic, it is not related to the ingame server browser at all, if you followed the instructions it will work on any distro, cod4x will be installed, thats the point.
Currently the ingame server browser stopped working for some people, including us, linux users. At the moment there is no fix for it. There are some tips on the cod4x discord server for finding servers, for example using 3rd party server browsers like C4S, GameTracker or the AVTI ingame browser list but that also lists non COD4X servers.
