Don't know about Noah, but the consensus is moving toward acceptance that there was a 'great flood' of sorts sometime around the end of the Younger Dryas period.
That hypothetical flood would have probably affected the direct ancestors of the Greeks... strange that Plato would only learn about it from the relatively remote Egyptians.
Looking at the oral stories of North American natives and comparing them to what we know of historical geological events, we see some truth to the stories.
So it’s plausible some stories of the Old Testament could have some historical roots.
Also true. We're talking about 2 separate flooding events. One in the black sea region, and another in Montana. As well as several other major historical floods around the world, and yes, Christians use that to account for one world flood, but the much more likely answer is that this was fairly common as the ice age ended. And we can see that it has been fairly common. As the icedams broke that held back huge amounts of water, it tended to wipe out anything and everything in the area, and people would talk about it for generations.