It would also suggest that the site continued to carried significance after the transition from Paleolithic cultures to Neolithic cultures, i.e. the arrival of Austronesian, between 4,000 and 3,100 years ago, who built the megalith stone terraces on top of the “structure”.
Despite of when it was built, it’s worth noting that the base of the mountain is made of natural andesite, and if the structure saw first construction 27,000 years ago, people only tried to make it look more like a pyramid. So it’s not quite at a scale like the pyramids in Egypt, where entire structures were man-made.
Estimates of the indigenous population in the Dutch period range from less than 100,000 to about 500,000. I’m not sure how reliable the upper-limit estimates are. Would 500,000 have been crowded in an era before irrigation and while hunting was may have been very important to some peoples? Not sure.
Estimates vary wildly for New Zealand, Hawaii etc.
I think people would have had a tougher time in New Zealand. I know the Hawaiians had pigs, but after the Maori killed off all the Moa, they had to rely on seafood for their protein, and it was a lot less reliable than having pigs or chicken around. In comparison, Taiwanese indigenous peoples had pigs, deers, and many other sources of protein. I think that would allow Taiwan to have had a much larger population.