if the question is "do they still have the tech like what carried those giant rocks in egypt?" the answer is "they probably have the text explaining it but they don't understand it anymore" and that would be because it has been systematically denied from them, as it says in Revelation regarding the chaining into the abyss and preventing the hand of the fallen angels from touching the rigteous (Rev 6-7)

what they do have is the knowledge of how to brainwash and manipulate and make slaves, which was given to them by the original "fallen angels" who started "civilization" on the shores of the Red Sea about 15000 years ago