Yes, I’m sure there is no evidence of a global flood.
Very well. Carry on.
There is very good evidence of a mesopotamian flood, which was the entire “known world” of the time, and almost certainly contained if not all of mankind, an overwhelming percentage of it.
The term “world” was used repeatedly in Genesis to mean this area (e.g., refering to Sargon (or variations of his name) as “king of the world” when we know there were other contemporaneous kingdoms in China).