The clovis solutrean connection was first proposed 10-15 years ago—all because of the simiilar spear points. In the last couple years however, I’ve read about archeologists who say that the same technology more likely developed independently.
If this story is recent, then there may be another shift in the wind.
It’s a difference of opinion. The likelihood is (and a researcher discusses it in one of those vids) that the culture lived primarily at the water’s edge during a glaciation so the areas where artifacts bridging the time gap are underwater on what’s now the continental shelf.