The material being used appears to be an Alucobond type panel. Rather than speculating that the entrance is going to be sealed up indefinitely. It is just as likely that the piece will be cut open later, as the most likely ornate opening will require a more precise operation that the installers of the panels (who just screw it down are not capable of doing). Or they are unable to cut the opening because the inside of the building is not ready or framed out accept an opening cut in the exterior cladding.