In past governments indigenous land was out of bounds, yet under Bolsonaro there is currently 1265 requests to mine in Indigenous territories pending. This behaviour is prohibited by the Brazilian constitution, which shows how bad this is. If the mining is illegal what is the ned for it to even be looked at?
Given in these cases this land has been given over to the tribes, it is not the governments to hand over to miners.
The big concern is that even if Bolsonaro is voted out after just one term, he may have destroyed most of the countries remaining forests and indigenous areas, meaning there will be little for his replacement to save.
One of the companies wrote to Mongabay after the article was originally published, they claimed that they did not know anything about it. Unfortunately the record of the request is clear, and it is worth noting that while denying the existence, they did not cancel any of the requests at all