According to the mod page, the upgrade should collect items in the ground, but nothing happens once I add it to the drawer.
Also, why does the upgrade have directions if it is supposed to collect all compatible items near it?

The drawer will collect items that are on the side specified in the direction, 1 block away, like a hopper

Oh, could you add an option to have (all) sides as an option? And also maybe upgrade versions of it that increase the distance?