Dear Bruno.
Thank you for your response. I’m not sure I’m following you correctly. Your article is called ‘Egyptian Metaphysics’, suggesting that your topic concerns higher levels of reality beyond the material world, even if it includes how that world is generated. And that is exactly what I thought as I read it. (I also note the other response, saying that you article sounds like Kabbalah and Gnosticism, which suggests that someone else thought the same.)
Here you say “a real story that happened in the past”, as if we were talking about a historical series of events taking place in the material world. You mention the flood, by which I assume you mean the flood in Genesis, a story found in many cultures all over the world. There I agree with you. But I don’t think that has anything to do with Nun, the Primordial Ocean, which I take to be equivalent to the ‘waters’ of Genesis chapter 1. Are sentences like “The fertile Nile Valley and foreign lands/desert are made” not metaphors for the manifestation of the material world?