For a good run-down of the various folks that may (or may not) have crossed the Atlantic, see Simon Winchester's book Atlantic (ISBN13: 9780061702587):
https://archive.org/details/theyalldiscovere00bola
https://www.amazon.com/discovered-America-Charles-Michael-Bo...
1: https://www.youtube.com/watch?v=7M0QnAqQUmw 2: https://en.wikipedia.org/wiki/Ket_people
Fine. Far Northeastern Asian Upper Paleolithic Hunter Gatherers then.