It's important to understand how children typically develop, especially when trying to help children who are developing atypically.
Most of my students are Autistic, but all of them at least have language delays. I sometimes get stinkeye from people who wonder why I spend so much time "just playing" with their child. I play with them because that's how children learn first, and I narrate what we're doing for the language aspect. I also use sign language, expose them to picture communication, and try to expand their interests.