Way more can always be said, but you might like this answer from a month ago by /u/Bem-ti-vi or this older thread from five years ago.

From the FAQ

Did the Iroquois know of the Aztec in pre columbian America? by /u/reedstilt

Indigenous peoples of Mesa Verde in Colorado and trade networks with the Maya? by /u/400-Rabbits and /u/RioAbajo

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Not from the FAQ but potentially of interest

Were Native Americans aware of other tribes across the continent? by /u/TeknikReVolt