Usually doesn’t work because of windows and custom drivers for the joypad.
The reason it could work with a 360 controller is the windows drivers for it. The same isn’t necessarily true for an off-brand controller though, or a steam controller in my case.
either way, its mostly a limit imposed by the way the OS works rather than the engine itself.
In other words, should probably be a request for the M$ team rather than the epic team.