There are a handful of companies that will try and sell you this. However Id say anything thats simple enough to be expressed as a chart or 1 page summary is not actually useful. Interesting outages have variable breadth, scope, and severity. Its usually some methods or a subset of customers that are impacted. Thats really hard to communicate as a straight percentage. You need to map it back to your particular workload and dependencies. And the meaningful result is how your particular application or customer experience would be affected.

Source: Im a principal at AWS, historically focused on infrastructure and availability/operations, have been oncall for 20 years, and do some internal incident management as my job.