any software to emulate a controller using keyboard?

So I want to play with my friend tboi (the binding of isaac) but he doesnt have the game, however, there is a local coop option that lets you use steam remote play BUT in for it to work the second player NEEDS to play in a controller and he doesn't have one (i tried using mine but still it doesnt work) so does anyone know a FREE and SIMPLE software for WINDOWS that lets you emulate a virtual gamepad using keyboard? everything i see online is turning controller input into keyboard output but i want the opposite. (also, this game is rather simple so it can be played without any analog sticks) I tried both UCR and JoyToKey but they both either serve for keyboard emulation or actually NEED a physical controller (and im pretty sure steam input works like this as well)