There is an outstanding book covering Papal documents on the rights of Indigneous People. It is called “That the World May Believe,” by Michale Storge, SJ. It is published by the Society of St. Paul in Canada (Editiones Pauline). As far as I know, it is only available through the Anishinabe Spiritual Centre in Espanola, Ontario. (Note spelling of Centre in this case).
You can search the internet for that Centre, or go to my forum profile and click to contacts. My web site is posted there and that has links (Research and Resources) to the Anishinabe Spiritual Centre and thus the book.
The book includes documents written since about 1430 and through the pontificate of John Paul II. I definitly recognize your inquiry and it is loctaed in that book along with other documents commenting on related issues about freedoms, rights and not to force conversions. Its Storge’s doctorate thesis, but I found it quite easy to read.