When a quick report is published, it grants the Projection to all available permission sets.
THere is no easy way to “Unpublish” the quick report.
I cannot find any option to select a Projection, and then remove access for this projection for several permission sets at the same time. This would be a most helpful feature.
My customer (currently 21R2) has hundreds of permission sets, to go in to every single permission set to remove the grant, would take a very long time.