This has been going on for a few years bow. They are making a big deal out of it now because the timing was right.

Remember in the months before COVID it was all about Natives shutting down our railway lines? Now that COVID is dying down the story goes back to “poor Native, bad White man”.

From 2018:

Earlier this year, he and a team of researchers found an unmarked grave near the Muscowequan Residential School in Saskatchewan by using ground-penetrating radar near the school's abandoned building.

https://www.google.ca/amp/s/www.independent.co.uk/news/world/americas/canada-indigenous-children-residential-schools-deaths-justin-trudeau-a8595441.html%3famp