Talking is ineffective as a means of communication — it's misleading, ambiguous, noisy, and often completely meaningless. And most people simply don't listen. This is why people often depend on means of communication that are more grounded in reality. There are basically two ways you can do it — do things to each other, or do things to a shared environment. Those actions are costly, often permanent, and as such carry much more meaning than just speaking.
Normie communities will often choose to do things to each other, something that we usually know as "drama". But more diverse communities may choose to avoid that, because neurodiverse people often find drama tiresome and even threatening. They will instead attempt use stigmergy for communication — this is often called "leading by example" or even "doocracy", but can be as simple as bringing a board game that you want to play to a game night.