I had checked that page not long ago, and as far as I remember there were many "red" or "orange" days in the past 3 months. Now it's all green. That's concerning
I clicked through wayback machine and couldn’t see any strong indicators that uptime had been rewritten, but there are a lot of snapshots. If you can prove it, I’m interested.
As said, maybe I'm really hallucinating and mixed up the official and unofficial GH status pages, but there are definitely incidents published in the official one that are not counted as downtime or even partial degradation in the uptime counter.