Giving Colorado, Montana, and part of the Dakotas to the natives is cool but I do feel like the majority of other tribes are getting sort of shafted by comparison. Honestly, Cheyenne population is so small after the Sand Creek Massacre and similar events that they don't even make up 1% of native populations. The Navajo, Cherokee, and Alaskan Natives, for example, each measure in the hundreds of thousands. About 8,000 people self-identify as Cheyenne and only 800 speak the language.

https://www.census.gov/library/stories/2023/10/2020-census-dhc-a-aian-population.html