No, the provincial governments in the period the children were apprehended were not stepping all over the rights of indigenous children. That is a completely false narrative and picture. What happened is simply this. As a result of family dysfunction, alcohol, unemployment, lack of education, domestic abuse, isolation, and many other factors on reserves, many children were in fact in danger. The provincial social services department have a legal responsibility to rescue children that are in danger of harm. This happens in white communities all the time. I lived adjacent to a native village on an island in the 1960s where there were about 1000 natives and 800 white people. I could tell you something from personal experience which I observed but have decided it might be better to not put it on a forum. Apprehending native children is not stealing their identity; it is society carrying out it's responsibility or caring for at risk children. Not much more can be said about that. The idea that governments deprived children's culture or identity is irresponsible and shows a complete lack of understanding of what the reality was. To now give some groups 750 million dollars for allegedly taking their cultural identity from them is a gross misrepresentation of the facts and a miscarriage of justice.
The Chief Justice Mrs. Bev McLaughlin shows in her essay, which I am glad you took the time to read, shows that the Supreme Court (and other courts) do in fact make new laws. They claim they are interpreting the Constitution or Charter of Rights, but often there is no such subject in the Charter. For example, show me in the Charter where it mentions doctor-assisted suicide or abortion rights. It is non-existent. If you read the essay, you would have seen they make ruling, not so much on the Charter or Constitution, but on what they perceive as would be a society norm or what society would accept as a norm. That's the plain fact that I got out of her essay and is supported by rulings that have nothing in the Charter to clearly support them.
You claim that women's right to vote is in the same league as some of these court rulings is ludicrous. Ruling that rescuing at risk children and depriving them of their native identity was not a crime or immoral action by social services workers. It was just natural if they were moved to a non-native home, they would not be in the same environment as natives living on reserves. No taxpayers owe anything for that and it was no offence. Millions of people immigrating to Canada are leaving their former cultures behind. They are adopting Canadian or western lifestyles and culture (hopefully; maybe not all). Nobody receives compensation or should for this. This is not depriving natives of their culture or identity. It is a fact of life in Canada. It has nothing to do with depriving rights.
I fear you have a lack of experience and knowledge in the real world. I don't blame you for that. Just that you are confusing women's right to vote with court rulings that having nothing to do with any rights. Aboriginal identity is not a god-given right. We have certain rights that our western democracies have historically recognized such as the basic freedoms of speech, religion, association, and the press. Cultural identity might be something the U.N. came up with from cultural Marxists and aboriginal rights activists who are demanding land and money from the western non-native society. They have been accusing non-native society as being guilty of "cultural genocide". You should also read the Truth and Reconciliation Committees report on their recommended actions and see how ridiculous the demands they made are. Google is your friend.