They are working on a cross platform app now. I can click mod manager download on cyberpunk mods, and it will install them as easy as the windows version.
Currently takes a bit of tinkering to set up, but its promising.
Also, if you're okay downloading and installing mods manually, many of them "just work", even some of the more tricky ones if you're willing to tinker a bit. Some games have mod installers that are cross platform (for example, Satisfactory Mod Manager has a linux version and it works great).