To sync a Nintendo Switch controller, you'll need to go into the "Change Grip/Order" menu on your console. There, you can add up to eight controllers.
To update your Nintendo Switch controllers, you'll need to head to the System Settings menu's "Controllers and Sensors" ...
The 8BitDo Ultimate 2 Bluetooth Controller for Nintendo Switch 2, Switch, and PC is on sale for $60 (was $70) at Amazon ahead ...