godot allows exporting to any os, from any os, and fairly easily. while learning how to do this in the scope of a 3-day jam may indeed feel a little harsh, it has been a godot wild jam requirement for the majority of its over five years of monthly game jams. it's a community that has been focusing on accessibility, which i think is a great thing, even if it demands some efforts.
also, remember that it's possible to export to html5, which is often a safe way to ensure people can try your game, no matter what system they're on.