Great stuff, as always. As you're interested in the Sphinx and its age, are you familiar with Linda Tucker's book

Mystery of the White Lions: Children of the Sun God?

Given your article here, it's right up your street, and contains material about the Sphinx different from, but not contradicting, the Schoch theories. I wrote about it briefly recently:

https://graham-pemberton.medium.com/skeptical-scientists-and-the-paranormal-part-4-linda-tucker-and-the-white-lions-e5212786f092