Genetic data indicate that Greenland sharks diverged from ancestral sleeper sharks in the Canadian Arctic approximately 1–2.34 million years ago
you are off by a bit?!?
early sharks existed back then, not greenland sharks.
i only know this bc the very fun zoo of us podcast did an ep on sharks last week https://podcasts.apple.com/us/podcast/333-great-white-shark/id1463896106?i=1000763230492