Physics2D.OverlapBox() not Registering TilemapCollider2D With CompositeCollise2D

Hello all. I'm trying to spawn game objects around a tilemap by checking if the object will not collide with anything before placing it. I essentially have a Decor object that contains the Required Size of the Object prefab it holds. For some reason though, Physics2D.OverlapBox() does not return a hit even if the box overlaps the walls, which have a TilemapCollider2D with a CompositeCollider2D. I've been searching for hours to find a solution, but nothing so far. I have the composite colllider's Geometry Type set to Polygons, since the Outlines mode only creates EdgeColliders that are infinitely thin. I even tried Outline mode and setting the EdgeRadius to something ridiculous like 20 and still nothing. Any help is appreciated.

Decor