Notably, none have been run on the million square miles of Sundaland and the continental shelf off China, now under water, where people lived for at least 70,000 years. We know they invented oceangoing navigation pretty early, because they got to Australia.
People did that another 100,000 years earlier and got to Crete.
The null hypothesis has to be that people in places with sufficient population have complex society, because that is baseline human behavior. You need good evidence of someplace they didn't, and an explanation why not.
As I said before, it's not logically impossible that a highly populous society existed in the pleistocene. But the constraints it would have to fit grow increasingly contorted as the state of knowledge improves. At some point it starts to resemble a small colony of advanced alien settlers who landed one day and disappeared a short while later. That explanation might honestly be easier to account for than what some people propose, since they don't have to develop their tech from scratch here on Earth.
2) it's pretty clear from both this comment and the substantial edits above that this discussion isn't in good faith
As you might have guessed from how I've written this, all these different lines of evidence consistently point to low population densities and overall populations, especially before the main human expansion out of Africa.
Advanced ice age societies aren't impossible, but there would need to be some pretty strong evidence and a good explanation to account for all the data we have against them.