Not one use of the words “Muslim” or “Islam” in the article, even though the religion of the 16 yr old is obvious to all - apparently Australian media are as determined to whitewash Islam as the US media.
Not really - the media will not publish the religion until that information is officially released by the police but once it is, most media outlets will mention it. Not all.
As a basic principle, though, the media does not publish information relating to an ongoing criminal investigation until the police announce it, and the police have only made a very bare bones announcement so far. That’s normal - it generally takes at least a day for a proper press conference (and today may take a little longer because of the ANZAC Day commemorations and it being a public holiday).