Graham Hancock isn't a reliable source for anything.
He was on these.
Bluefish Caves and Old Crow Flats were published in Canadian Journal of Archaeology, White Sands in Science, Hartley Mammoth site in Frontiers in Ecology and Evolution, Cerutti Mastodon site and Monte Verde in Nature.
https://www.jstor.org/stable/41102194
https://www.jstor.org/stable/41102449
https://www.science.org/doi/10.1126/science.abg7586
https://www.frontiersin.org/articles/10.3389/fevo.2022.90379...
Not being reliable is not the same as being untruthful. And here, Graham was right.