How To Use An Xbox Controller With Your Nintendo Switch
By QUENTYN KENNEMER and BRITTANY ROSTON
To use an Xbox controller on your Nintendo Switch, you’ll need an adapter. 8Bitdo's wireless USB Adapter 2 retails for just $20 at Amazon and works with other controllers as well.
To set up the 8Bitdo USB Adapter 2, first make sure that your Switch is updated to version 3.0.0 or higher. Next, navigate to System Settings, then to Controller and Sensors.
Press the "pair" button on the adapter until you start to see its LED blinking. If the lights on the controller and the adapter go solid, they have successfully connected.