Much of what you'd recognize as Mexican food or Central American food has roots in Native American food of those that spoke Nahuatl and its dialects (Southwestern tribes and further south). Many versions of corn, many non-sweet versions of potatoes, and many peppers are native to the Americas and have obviously been integrated into other cultures and cuisines. As for reasons why such food is not represented as Native American . . . Imperialism? Appropriation? Assimilation?

If you're truly interested Native American food, don't Yelp it. You'll probably have to speak to several people at a Reservation, Tribal Council, Cultural Group or perhaps a museum curator.