A global flood ca. 4350 years ago has not been found by archaeologists or sedimentologists.
It’s the same as the guys with the painted stars and 6000 year old Earth, they want to tear away the mystery of God because without proof, the ability to sound “Scientific” about everything some how he is not real. That’s why it’s a belief system, not a fact system. It seems contradictory I know, but even as much as I love science myself, it fails to answer the really big questions. One of my favorite pieces from that Val Kilmer Mars Movie was the older scientist who had faith. That was his take and it was a good one. Science has limits, after that there seems to be just a little bit more that can’t be easily explained.
That is the beauty of faith.