I take it as a plausible depiction of Polynesia rather than any specific location therein: that is, it feels to me like it fits believably within that culture sphere, like these could maybe be a handful of islands somewhere in the Pacific that just don't happen to be the ones we know.

I agree that it feels like it's taking place in our history rather than a Polynesian-inspired secondary world. I liked that. It makes the recognition of the voyaging all the more significant.

Maybe I could just say, it was accurate enough to make me pleased that I saw things I recognized from my reading being represented on the screen.

That's a legitimate data point! Thank you for it.