Due to state-by-state legalities, it isn't available in every state that even had recreational weed being legal for quite a while. In WA, weed delivery is still illegal, and Ease tells you that they cannot service that area.
So I agree with the parent comment, but I want to clarify that I don't think the parent comment meant as "doordash for weed company will emerge". I think they were implying that the law changes that would allow that to happen, and then one of the companies in that niche will become truly big and successful.