At the time of writing, only the beta Steam client supports DualSense, so you need to switch the Steam client to beta first. Click 'Steam' displayed in the upper left of the Steam client, and click ...
There are several ways to turn off your Nintendo Switch or put it into Sleep Mode, most of which involve the power button.
Need to restart your Steam Deck, but can't get to that power button? Here are a few different solutions to help make ...