Right on the money Chris, I was getting an error trying to access empty tuples, lazy coding on my side. As soon as I sifted inputs by “face.has_sub_faces”, I was able to access aperture properties by calling
get_attr_nested(face.apertures[i], ATTRIBUTE).
So, never mind getting apertures directly from the original HB object, I find it better to get faces and from these get “faces.apertures” and from there you can access all properties.
Having the documentation for LBT is such a life changer.