Aren’t there a couple of versions of that?
I’ve always thought there was a high civilization back more than 10000 years ago that got wiped out by a major earth wide catastrophe and the Sphinx is a remnant, as are the trilithon at Baalbek and other megalithic sites.
What people should understand is the fallen angels bodies were killed in the flood but their spirit is still alive. Secret societies are the continuation of their teachings. We have not seen the last of them.