Also a TV episode:
https://newrepublic.com/article/116287/babylonian-tablet-describes-noahs-ark-pre-bible
“According to Finkel, Genesis was assembled between 597 and 538 BC during the Jewish exodus in Babylonia.”
That’s from the article you posted. The “researcher” of course is an idiot. Genesis and the other early books of the Bible were based on oral stories that are much older. And not stories as in “made up”, but stories that had a strict prescribed manner of telling due to there NOT being a written language.