there is many other data points for some parts of it though

like the white skin blonde/red hair stuff... you can pin this to a mutation that emerged after an event 42000 years ago... in the book i learned about this, they said it was related to a star 400 lightyears away blowing up and blasting out a shockwave of X- and Gamma rays and that seemed plausible but i also learned today that coincides with the Laschamp Event which is the most studied geomagnetic excursion known

anyway, it's one data point, i recommend checking out The Book of Jasher and The Book of Jubilees, a couple other apocrypha that tell slightly different versions but mostly corroborating to the story in Genesis

the fact that maybe more than a dozen literal direct sayings attributed to Jesus are directly from Enoch suggests that back in those times Enoch was widely known, that alone is kinda significant, even if the provenance is weak in places