Do you think the Bronze Age peoples of Egypt built the pyramids? Youtube has been sending me down these rabbit holes lately and my internal historical timeline keeps wanting to drift to the Younger Dryas more and more. ;)
YouTube is made of many a rabbit hole; among the worst are this crazed-looking guy whose channel is called "Bright Insight".
The Giza pyramids (which is the best known group, includes the Great Pyramid) were built during the 4th dynasty, the (robbed) tomb of the architect of the Great Pyramid is not terribly far from the Great Pyramid (Hemiunu was a cousin of Khufu), and among the ancient graffiti inside the GP is a message from one of the work gangs that built it ("How mighty is the Great White Crown of Khufu").
The Sphinx though, that's another story. The head was sticking up out of the sand, yet it shows the least wear, the opposite result it is reasonable to expect (obviously recarved). There is some wind erosion on the enclosure walls and the Sphinx itself, but both were primarily eroded by water, as was pointed out by geologist Robert Schoch and before that the late John Anthony West, who got the observation from Schwaller de Lubicz (I saw his widow give a talk one time, long ago).