Please Help connect my controller

Hello,
I have purchase a PowerA controller ( www.amazon.com/PowerA-Nintendo-Switch-Wi...s/dp/B075DQ13SR?th=1 )
and I want to use it in my PC, more specifically with Wither 3.
I can control Steam big picture with the controller, but not the game.
I downloaded InputMapper, but I don't know if it works only with DS4s.
The program does recognizes (I think) my controller, but even with it open I cant play the wither 3.

Does someone know what I can do?
Thanks in advance.
https://imgur.com/gallery/fiI33fp

https://imgur.com/gallery/VUbnPWN

Current version of IM is just for the DS4.
I surprised you can't use it through Steam. In Big Picture mode you select the game from the library and select manage game to get to the controller settings for games.

In purchased the game thru GOG, I will try to import the game to Steam and see if works that way.
But if it doesn't do you recommend some other tool to map the directInput to Xinput (or vice-versa , can't remember right now).

Thanks.

MotioninJoy and x360ce are a couple I know of that will work for that.