Kwanzan and Yoshino cherries are not native to NC. The other cherry trees you see everywhere growing at random are wild black cherry trees, also known as rum cherry trees. The little fruits are edible but the seeds are toxic to humans and the fruit has been used for flavoring rums historically or making sauces for pies and treats. The black cherry is native to NC where the others are not. These trees literally grow like weeds everywhere in NC.
Used to be a couple of larger black cherries in my yard until they broke in storms. My wife's chickens lived and died by those berries, it was crazy how much those birds loved and fought over them. Anyway, I hope that answers your question.