Most companies don't release outage reports period (exhibit A: Roblox). The cloud hyperscalers kind of need to though, because it's not just their own business on the line.
In the early days of GCP, major outage reports were written and signed by SRE VP Ben Treynor:
In the early days of GCP, major outage reports were written and signed by SRE VP Ben Treynor:
https://status.cloud.google.com/incident/compute/16007