How to copy object to center of primitive and rotating along primitive normal? ops:

Create a point on center of every prim with the same normal attribute (I use a foreach in the example).
Maybe there's an easier way but… :

With certain mesh topologies you can use the Divide node with everything but Compute Dual turned off. There are instances where this doesn't work, like a strip of polygons, so double check it to make sure your post-point count corresponds to your pre-prim count.

nice example thank you very much.