Trying to build Hangover but can't install llvm-mingw

When I went to install llvm-mingw, the prebuilt packages under releases seem to only support Ubuntu/Mac/Windows. Is there any way to install it on Fedora if I don’t use the prebuilt packages?

You could try using Distrobox, where you can install an Ubuntu container alongside your main Fedora host. Distrobox - ArchWiki