I've tried to take a look, but unfortunately it seems you need to connect a controller for it to do anything. I just have a keyboard and mouse. I've also done some searching on how to accomplish this, but came up empty. Do you have any insight on how to accomplish it?
this looks like highly sophisticated gamepad emulation. IDK if you can map mouse and keys to your virtual gamepads easily, but the readme suggest that you definitly can. Looks like some work though.
this one is a fairly simple python script. I don't know if you're into programming, if it works you only need to change it so it registers mouse input and map that to the virtual controllers stick