OpenNest doesn’t work with the holes in your surfaces because they are "Circular Curves".
If you extract the edges from your surfaces, join them, and take the longest edge this gives you the outside edge. You can use this as the Geo input to the OpenNest component and then use the Transform output to arrange your surfaces.
simple file_re-01.gh (16.5 KB)
An alternative would be to use polylines instead of circles to make the holes in your breps. Then you could just input the surfaces to the OpenNest component.
-Kevin