You don’t remember it because the books are set from 1991-1997, if memory serves. Since the Millennium bridge came about because of the turn of the Millennium, it wasn’t there yet… So yes, you could say that the writer is getting braver. It’a a good thing we don’t have the whole Death Day thing in chamber of secrets to give us a definite time frame for the movies, or that would be a wild anachronism.