this? https://gitlab.gnome.org/World/Shortwave
I think on a system like that you shouldn't even run a GUI or a window manager at most. What is the service that is actually using though, it links to this https://www.radio-browser.info/ I guess I see you can play stations directly from that. It seems it makes more sense to use like lynx browser or something to just browse that website directly.
I've clicked like 10 of them they are all mp3 or aac. mpv or vlc can decode those on the command line and play it with using like 15-100mb of space on your storage. Like this random station for example https://stream-uk1.radioparadise.com/aac-320
all in all your total install should be like 400mb
don't wanna be mean to any demographic but it's literally the windows gamer converts. Not all of them though. At the same time that kills the other linux elites of "you don't compile gentoo from scratch on every system?" so..