The whole effort was no building the Giza complex. The monuments were build on one grand golden angle plan - all are interconnected by golden angles and Fibonacci spirals,
The only dating test (Optically stimulated luminescence (OSL) ) on the smallest and supposedly the newest one, came out 500 years older than thought. No further tests were permitted by the Antiquities Dept.
What they found was the restoration of previously existing monuments. Which at the minimum preceded the Archaic Period ( followed by the Old Kingdom Period ).
All of Ancient Egyptian dating is currently based on various Kings Lists, some of which are known forgeries, but are included anyway.
I have my own opinions on ancient Egypt - which align with other unorthodox thinking - but it's a glaring red flag when a culture rewrites their prehistory through forgery.
Thusly, NONE of Egyptian 'written' history can be trusted as fact, and it's also a red flag that at every turn the 'Egyptology overlord' prevents any study which conflicts with the established narrative.