I also recently had some pokemon link battles, trades, ane raids with friends without wifi. (It has a “connected to online services” and “disconnected” states,

I also recently had some pokemon link battles, trades, ane raids with friends without wifi. (It has a “connected to online services” and “disconnected” states, fun thing is that while disconnected the codes to join rooms (ie local) are 4 numbers instead of 6 alphanumerics) Switch still allows local multiplayer if the games implement it.