On TDW, where I mostly operate, I created this timeline of events regarding the Vatican Blackout. Many of the details seem to be as much of a mystery to TDW as it does here, but I hope it can aid you in your research.
https://thedonald.win/p/11RhcvunCq/timeline-of-events-regarding-the/c/
No, unfortunately.
This article is also highly suspect, but it could very well have a bit of truth to it. It was recently updated as well so it seems they're sensitive to how sensational the news is:
It is unclear what they mean by FBI, since the FBI as it pertains to the US is probably a hostile actor and shouldn't even have jurisdiction in Italy.