It’s only been a couple of business days, and it’s likely that they themselves will need root cause from equipment vendors (and perhaps information from the utility) to fully explain what happened. Perhaps they won’t publish anything, but at least give them an opportunity before trying to do it for them.

I expect them to start reporting out what they know immediately, and update as they learn more. If they're not doing that, and indeed haven't reported anything in days, that is a huge failure.

Imagine if the literal power company failed, and took days to tell people what was going on. You can see why people are reading the postmortem that exists, rather than the one that doesn't.