That's good. It's similar to Brazil in the sense of recognizing and preserving tribal cultures. That's important, but it doesn't extend to all native people. There are movements here advocating for the recognition of the urban indigenous—people who live in the cities but aren't officially recognized as having native ancestry.
Even more, it's increasingly expected that there were big cities in the Amazon, featuring complex trade routes. However, this topic still needs to be studied more profoundly for various reasons.
It all depends on History, specifically how groups like the Aztecs in Mexico and the Inca in Peru dealt with the Spanish. Their elites were often made kings (or viceroys) in the early post-colonization period. That makes a significant difference in the subsequent social structure.
That's common culture/knowledge. But I don't know, seems like rubbish to me. If English colonization has different methods, what can you say about Trinidad & Tobago? And the English Guyana? Let's not go to Africa and Asia. It doesn't seem to be their "modus operandi" to me.
I don't think there is some big extermination plan for America and Australia. I think there's just something different to those places, but that requires more study. Not of the common knowledge kind. Why would you want some kind of extermination colonization strategy for Australia? It's weird. It's more of a "counter-study", but I believe there are people fighting the good fight out there. I'll put it on my list and research it.