> I believe it is being fed by GitHub.com's incident data.
This is indeed correct.
Now https://www.githubstatus.com/ is declaring an incident but your page doesn’t have it
Maybe I spoke too soon in labelling your page “more accurate”?
It is only being updated once per day. In an ongoing incident it is indeed not necessarily more accurate.
GitHub has outages all the time without that page showing anything.
Another comment pointed to a third party alternative which is more accurate – https://mrshu.github.io/github-statuses/ – but that alternative isn't showing an outage right now either, since I believe it is being fed by GitHub.com's incident data.