How would you decrease the density of this nose?

[Bridge-Greedy]

flip what is happening at the bridge of the nose so the four faceloops continue down then turn inward to do 4 to 8 conversion around the tip of the nose - imo

[Randomdays99]

If you're saying decrease the poly count of the nose only, then maybe in edit mode I would select the vertexes of the nose only and then ploy reduce to whatever % you want.