If S3, EC2, EKS and RDB alone had a similar uptime as all of Github right now, we'd all know.

No one cares that much if repo wikis, commit stats or gist had these issues. It's the combination of inter-dependent services that are used in combination, like PRs, actions, discussions, etc.

If one were to build a single percentage for each of these components of both systems, github would still lose. Maybe it's a few days without outages more but this isn't a comparison.