I think you're being very generous in your beliefs about why people flag these sort of stories.

From my observation, the only topic that will definitely be flagged before any discussions is genocide in Gaza…

I mean, it trivially fits a number of them but a really big one is 'repetition'. Various political and other not-entirely-HN-on-topic stories end up on the front page and have threads but these are exceptions for particularly unusual or big ones. An administration that engages in daily shitposting-through-executive-order gets a couple of these for novelty but the novelty has long worn off - you'd have to fill HN with them if they all counted as exceptional.

Of course, if you think this one deserves special treatment, the thing to do is email hn@ycombinator.com and ask for flags to be taken off. I think in this case it's a little uphill (as another toplevel comment points out - the news has already overtaken this thing) and you'd probably need to find some sort of third party reporting rather than the government press release.