How to sync Nintendo Switch controllers with your system, so that up to eight people can play at once

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.
IGN

The 8BitDo Pro 2 Controller Is $30 Cheaper Than the Nintendo Switch Pro and Nearly As Good

The 8BitDo Pro 2 controller is compatible with both the Nintendo Switch console as well as any Windows, Mac, Android, Steam, or even Raspberry Pi device. It uses wireless Bluetooth so it works with ...