To be fair, its not yet a huge story.
Bones of dozens if people have been found in a place where people are buried. They are currently trying to prove that some are more recent than they should be. Once they prove that, it will be a big story.
Also, as of yet, there is not proof the missing girl is there. They havent even said they found the bones of a young girl, from what I can see.
Lots of bones found in a catacombs, wouldn't be big news in Italy if it happened here.