you could same the same for punt, land of kush. kush particularly is littered throughout the testaments and abrahamic literature. so no the folktales of egypt are not the only sources for their original inceptions, nor the followers that came later.
those kingdoms spurned ideological sprees across most of the levant in much the same way as Egypt.
remember a lot of revisionist history comes from white civilizations, and of course they enjoy the ones they personally interacted with.
again, this adoration for this one civilization is an issue and it needs to stop. It's incredible, amazing, arguably the greatest in history, however it isn't so above and beyond other civilizations that it deserves this strange adoration. that truly mitigates what other africans accomplished and will accomplish in the future.