You can only have one island per switch and game.
My wife and I bought a switch $330 and Animal crossing New horizons $79.95
Only to find out one person makes the island, chooses where everything is placed. While the second player can't complete any missions, make any decisions only pay off house debt by running around the small original island because I can't get the pole volt.
Annoying they want me to spend another $410 to play this game in its full glory