Heh, forgot to include the link before.
Article says:
“Notably, this suggests that the ancient genetic material obtained during early encounters between humans and Denisovans may have contributed to the survival of their descendants as they migrated into the previously uncharted Americas at the end of the Ice Age.”
That may be what it suggests to the authors, because that’s their idea.
What it suggests to me is this scene, maybe in New Mexico 14,000 years ago, when the “indigenous” Denisovan says to the newly arrived “modern human”: “It’s about dang time! What took you guys so long?”
Remember, an asteroid or something wiped out most North American human life and a lot of flora and fauna about 12,500 years ago. We really don’t have a great record of what earlier people were up to.