No. Only the Great Pyramid is prediluvian. Dr Noah Hutchings wrote about it, and referenced other authors.
Amazingly, it appears that the alien enthusiasts are actually more logical than mainstream thinkers. Their only problem they get wrong is where the technology came from. But other than that, their reasoning is solid and comports with science.
If you take into account the Greek Septuagint, there is no reason that they were not all built after the flood. Man, just after the flood would have been far more capable than us today, in many respects because they received knowledge from Noah and his sons, who all pre-existed prior to the flood.
The pyramids aren’t that important. What is important is the Ancient Israelites timeline that, using the Greek Septuagint, allows the Bible and Egypt timelines to coincide very closely. It helps validate the events in the Bible, including whether or not Joseph was really Imhotep.