Its very easy to add a feature with Karabiner Elements as it can download scripts from a repo. Hammerspoon too, has a lot of snippets and scripts available (I haven't used BetterTouchTool as I avoided touchbar Macs). That's one of the strong points with AHK. I look up a syntax or example code and boom (and I am a lousy programmer so if it works for me, that says something).

But I got AHK running in Wine on Linux, and on another Linux machine with Wayland I got simple rebinds and simple scripts working with keyboard and mouse (which I could extend with say Python scripts from AutoKey?). Its more difficult on Linux, but its possible.