> I don't think that was a very deep look at the app

I doubt it was, but my headcanon is that some poor App Store reviewer saw something that looked like code and grabbed a supervisor to do a deeper review.

I haven’t heard the term headcanon before.

https://www.urbandictionary.com/define.php?term=Headcanon

An idea, belief, or aspect of a story that is not mentioned in the media itself, but is accepted by either the media consumer themselves or the fandom in general. If it is confirmed by the creator of the story, it becomes canon.

It's a quite popular term, but only within media fandoms. So if you don't fancy searching for clues in each single frame of a new episode of $TV_SHOW and arguing with strangers on the internet about how to interpret the exact wording in that dialogue, you probably haven't come across it yet.