I think this would be quite low on my list of assumptions of the cause of downtime. Issues might cause a domino effect that may take days or even weeks to surface, or the mitigations to original problems might introduce issues of their own.
Last I checked, Apple runs a lot through AWS which has a few DDoS resilient interfaces to the web very commonly being used by its customers.
As for other cloud provider outages, I doubt it's more than a coincidence if nothing has come out about the issue weeks after it first started - still possible there's some bad actor causing outages in ways that aren't detectable as botnet attacks.
Last I checked, Apple runs a lot through AWS which has a few DDoS resilient interfaces to the web very commonly being used by its customers.
As for other cloud provider outages, I doubt it's more than a coincidence if nothing has come out about the issue weeks after it first started - still possible there's some bad actor causing outages in ways that aren't detectable as botnet attacks.