There never has been official Linux support, the Linux port has only ever been a courtesy, without official support or testing.
Building for Linux has been disabled recently since Mono had some changes made that would need porting into the Alpine dependency management stuff, which hasn’t been done yet, and won’t be any time soon either, since there is currently no build machine for ad-hoc packages like this.
Not sure why you think that - Linux is a mess to deal with for native C++ projects, especially once additional dependencies exist and you want to run across distributions.
See also: this post in Windows or Linux? FiveM hosting and a TS! - #14 by tennessine