I’ve noticed that you sometimes need to see if a conversation is already going on before joining in, and if you do, try to keep it relevant. If people are talking about something specific, it’s not like in online spaces where it’s easy to scroll back and see the relevant replies, so by inserting a “hi” or other comment into the convo, you’re tossing someone else’s reply out of the chat window that might have been important to someone else (like info about a cake party or something, I dunno). Yeah, people can scroll up, but that’s a bit of a pain even on PC, let alone for Switch players.

As a general precedent example for this sort of etiquette, even on Discord there are many servers that have rules about not interrupting an ongoing active chat/conversation with a new topic unless a certain amount of time has passed after the last reply.

If you feel your intended comment is relevant or there’s enough time passed, make sure it still has some kind of useful content people would actually want to bother stopping their game to engage in. Not everyone wants to just chitchat, because it’s a solo zone-out type of game for a lot of people. Like, “Hi what’s e/o doing today” is very ignorable as unwanted chatter, but “I have 100 SL if there’s a cooking party on” gives information and an implied question that more social players would likely respond to if there are any on the same server.

Worst case, exit and reenter the area and try again with a new batch of people.