Those aren't actual "writings" but someone's supposed timeline. Anybody can come up with a timeline.
There are writings. Writings on the walls of tombs. Writings on the walls of temples. Writings in the pyramids. Writings telling the story of this pharaoh and that pharaoh and their exploits. Writings about battles and victories. From these writings, historians piece together timelines. None of these writings mention any Flood.
But, you believe what you want to believe. I'm done on this thread.