Playing online against randoms with 2 players on the same Switch?

Sorry if this has been discussed before.My brother and I wanted to play on the same Switch against randoms online. We found that this is not possible. It looks like you can play online on the same switch when you create a room, but this seems to require having to share a room code with others, presumably with friends.Is there no way to play on the same Switch without room codes? We just want to be matched against other players at random.A second, related question: is it possible to join a room code with two players on the same Switch? I'm asking because it seems like it's not possible. We could online find the option to play with 2 players on the same Switch when creating a room.