As far as I know, except for smaller events like the Manitoba Uprising, there hasn't really been any major conflicts between the Canadian government and the First Nations while there were numerous such conflicts in the US and Mexico. Why was this the case?
I would disagree with you that there were no major conflicts/wars between Canada and the first nations. I wrote about the Red River Rebellion/Resistance (I assume this is what you meant by the "Manitoba Uprising") and the Northwest Rebellion/Resistance here: https://www.reddit.com/r/AskHistorians/comments/gbf0jp/were_there_any_instances_of_violent_conflict/fpdmex6/