Our history books often overlook the existence of the giant race, but the Quran explicitly mentions them. In Surah Al-Ma'idah, it states, " They said, "Musa, a giant race of people is living there. We shall never go there unless they leave the land first. If they leave it then we will enter (5:22)" (jabbārīna in this verse should be giant race)
Similarly, the Prophet Hud addressed his community, the people of 'Ad, saying, "Do you wonder that a reminder has come to you from your Lord through a man among you, so he may warn you? And remember when He made you successors after the people of Nuh and greatly increased your
stature. So, remember the Bounties of Allah so that you may succeed" (7:69).
This raises the question: was this race confined to the Middle East? The answer is no. Remnants of this race have been discovered in South and North America, Europe, Africa, and the Middle East
For some reason, their existence has been denied by top people through certain Institution. Whenever any giant skeletons are found, they are removed from public access. In 1909 a newspaper article claimed that archaeologists discovered Egyptian artifacts in the Grand Canyon, including hundreds of giant skeletons and artifacts that dated back to the time of Ramses the II . This particular expedition was sponsored by the same institution, and, unsurprisingly, no one heard or saw anything about it afterward.
They certainly know who constructed the Pyramids, yet they keep this information from the general public and mislead us into believing that they were built by ETs.
Here is a link to a video that describes the mischievous role of that Institution
https://www.youtube.com/watch?v=hTDurcg0h38&t=1s