I am not sure of the facts of dating of when the Noah flood was said to have taken place but I guess it must have been within a few thousand years ago, if indeed it occurred as written.
A question that arises for me is how many animal species would have been in existence at the time. Bearing in mind today there are about 9-10 thousand bird species, about 6 thousand species of mammals, among a total of 8.7 million total species (insects etc included). I doubt very much that Noah could have built an Ark big enough to have them on board.
A second question would be related to the extent of the flood and how Noah could have obtained species from across the Atlantic Ocean and from Australia etc.
This all casts doubt on the story being historically accurate .
So how instead should we see the story and any theological messages that arise from it?