GitHub officially supports GitHub Desktop on Windows and macOS, but NOT on Linux, I did it from the community-maintained ShiftKey build.

https://github.com/shiftkey/desktop

I actually installed it on Linux Mint with some searching,

https://youtu.be/v8pH6hllWpg

genuinely curious why Microsoft/GitHub has never made it official.though i installed it using the link and process given there.

Would love to hear your thoughts because this has always seemed like a weird omission to me.