Otherwise, all non-first profile to initiate a match in ACNH
It's an Integrated feature for Animal Crossing Bells New Horizons: One save match per Switch. If anyone in your family would like to perform their particular island and revel in the Island President therapy, well, they need to buy a whole new Switch system and a whole new Animal Crossing game.
Otherwise, all non-first profile to initiate a match in ACNH are second class citizens residing in a person's island and are barred from progressing the sport or taking any purposeful decisions in its development.
You'd be surprised how many ACNH earnings are actually just people buying another copy so they may have a second island on a second Switch and play with them both at precisely the exact same time (a few people today use the secondary island for storage, or even just to be creative in a way they are not on Cheap Animal Crossing Items the main island).