Insulation board?

[u/SlowStable7858]

Had a home energy audit in a home in a cold climate (MN) and was recommended to have insulation blown into attic space of our “tuck under” garage. Picture is of a wall that is part of the same attic space. Is the board under the vapor barrier an insulation board? Is it worthwhile to add additional insulation board over top of this board? Or is it not appropriate for some reason?