Input Actions in the Game menu using "Set Input Mode UI Only"

You need to set ovveride input functionality. In the BP for the widget, on the functions tab, there’s a little drop down box that says override. Click here and find “on key down” I believe it is called. In this function, pull of the pin, call get key, run an == check for desired input, and executing desired functionality. On the return node you have to also enter a “handled” node to the input.