Just to tell you: Steam now supports the Joy-Con controller for the Nintendo Switch.
Valve added support Pass the latest Steam client beta Released earlier this week.
This update supports using the controllers individually as mini gamepads and combined in pairs.
It also adds improved support for the Nintendo Online Classic Controller, which was added in June.
If you want to try this feature, you need to join the Steam beta.If you plan to use a controller, your PC needs a bluetooth capable motherboard, or you can use a bluetooth adapter like this asusE.g.