https://collider.com/echo-choctaw-origin-story-real/

The Choctaw stories have links and parallels to the real world.

Marvel's Echo: Choctaw Creation Myth & Real World Differences Explained (https://screenrant.com/marvel-echo-choctaw-creation-myth-differences-explained/)

Marvel Studios explored the Choctaw Nation's real-world creation myth in Phase 5's Echo series, but changed some aspects of the ancient story.