I can answer that.
In 2020, Statistics Canada published a study based on its own questions and its test of the new census. It feels that with the addition of these new questions, which take the three criteria that define rights holders into account rather than only mother tongue, there would be 56% more rights holders. In some provinces, like Saskatchewan, there would be an increase of more than 80%. It's encouraging to see that there are more rights holders.
However, the major challenge is to not only enumerate them, but to get the children to school. The 2006 post-census survey showed that lack of access to schools, and distance, were the reasons often given by parents for having sent children to another institution.