No evidence? I've been saying all along that there's NO evidence that even suggests the dynastic Egyptians built the megalithic structures in that country.
IOW, you have no evidence for your claim, but you make up for it rejecting evidence for the contrary.
The architect of the Great Pyramid is known, his image is preserved in a statue, and it was excavated from his tomb near the pyramid. By contrast, you have zero evidence that anyone else built any of this stuff.
There IS no evidence to the contrary.
The Cairo Museum has thousands of dynastic Egyptian tools on display, but you know what's missing? Tools that are hard enough to cut, shape, and polish granite. That would be evidence to the contrary.
They also have hundreds of illustrated panels, showing daily life in their world, and the world of their pharaohs and gods. What's missing from those illustrations? Any depiction of pyramid building or other megalithic construction. That would be evidence to the contrary.
You know what else is missing? Any inscriptions inside the pyramids. But wait. Didn't the ancient Egyptians put their mark on everything they built - most especially the tombs of the kings? Yeah, they did, so where are the inscriptions inside their greatest monuments? That would be great evidence to the contrary.
I am not trying to prove to you that an advanced precursor race built Egypt's megalithic structures. I'm telling you that all objective evidence points to that conclusion, and away from the bankrupt theory which proposes the ancient Egyptians built them.