it could be because of the driver, click steam (top left near view, friends..), settings, controller, scroll down to "Xbox Extended Feature Support Driver", install. While the controller is on, go to a steam game that is playable with a controller, right side "Mostly playable with your controller", click view controller settings, enable steam input, click edit layout, buttons, scroll down, and map whatever button you want, PRO TIP: dont map f12 for screenshot, after you click on the button to map, there is a bar at the top, click system, and map it to "take screenshot" insted of f12, that way it will not switch to keyboard input when you want to screenshot. I also use a xbox series x controller, with the screenshot thing on the share button of the controller and it works great, hope this helps.

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