Can I link my Nintendo Account to more than one Nintendo Switch console?
You can link your Nintendo Account to multiple consoles. You can play digital games you've purchased on any Nintendo Switch console that has been linked to your Nintendo Account.

Please note that you can register one primary console per Nintendo Account. Once you've registered a primary console, your digital purchases can be played by anyone that uses the primary console. Other players will not be able to access your digital games on a non-primary console.