There was a documentary I saw once where they used the best estimates for how long it took the Great Pyramid and how large the work force was and then scaled it down. Like if it took a work force of X people Y number of years to build the Great Pyramid, then a few dozen guys would be able to build a two storey tall pyramid in two months with the same technology.

So they did that. And despite being inexperienced with the ancient technology and having to figure out how to push these massive stone blocks on rollers and make the corners around a spiral ramp winding around the pyramid, they got their little pyramid done on time. The math all checks out on people being able to build the pyramids provided they had a large enough workforce and enough time to do it.

Yes the Pyramids are impressive but it's because it took a lot of work over a lot of time to build them. But it required no special technology. Just a lot of dudes pushing heavy blocks on rollers up a ramp over many years.