I thought all deaths where the deceased is alone at the time of death are referred to the coroner? I don't see why this is odd at all.
Pretty sure that depends on which state you are in, NSW I have no idea. But from the link it seems that if no one attends to produce a death certificate that's most likely the case. However this individual has already been attributed a death cause by the look of it. Just reading the news it says un-vaccinated and one of two in the house, the 2nd has been moved to hospital.