I dont thinkk you should be worried but maybe it might help to actually ask her questions where she has to give you a response by giving her options.

You might say "Would you like to dance or draw?" therefore she will ahve to tell you which one she wants to do.

Dotn get to stressed. I didnt talk until I was 2 (I had a sister who did alot of talking for me and I was also a quiet child who was content to be left to my own devices)

I have never had any speech problems or speech therapy. So all good here!