Instead, use the USB cable provided with the Pro controller to connect it to the Switch 2’s TV base. While the Switch 2 is in the base and on, it will synchronize the controller.

These instructions are essentially the same for an Xbox controller. Connect the adapter to your Switch 2 dock and press the pair button on the adapter until the LED starts blinking.

The Ultimate 2 Bluetooth Controller has premium features and a bunch of customization options for Switch 2, Switch, and PC ...