GCP (and all of Google) was down worldwide in 2013 as one example:

https://www.theregister.co.uk/2013/08/17/google_outage/

Here’s one that’s on Azure. Not a 100% total outage like above, but bad enough most I know in the industry would call it being down:

https://www.zdnet.com/article/windows-azure-suffers-worldwid...

If I get a free moment, I’ll dig up other examples, but those were ones that were easy to find.