"Secret" is the clickbait, as it implies that there's some kind of subterfuge going on. The app isn't intentionally hidden as far as I can tell, so "preinstalled" would be far less sensational.

Any operating system distro is going to come with a bunch of stuff that you're not necessarily going to use; obviously it's less than ideal if distributions are being shipped with old junk that nobody uses, but it's hardly the crime of the century.