I was watching a documentary on the ‘Clovis People’ and immigrants that may even predate Clovis. Apparently, there’s some evidence that the very first pre-historic visitors to the North American continent may have been European in origin. At worst, the arrival of Europeans and Asians may have been reasonably simultaneous. For reasons not yet understood, the European settlers didn’t make it. They either returned home or perished.
In any event, the ‘accepted scientific belief’ that Clovis was first and originated either in Asia or Oceana has become almost a touchstone of faith in archeological circles. To suggest otherwise makes one a kind of heretic probably because the notion that Europeans first colonized North America is too unsettling to the accepted contemporary orthodoxy of the White Interloper.
I believe I have seen that show. The main point was the Clovis people learned to chip flint points from the Europeans they encountered at that time because flints found in Siberia were vastly different from those points found in the Americas.
But then. like so many so-called TV science shows take it with a grain of salt.