There is brief mention of this in another thread, but is is at the end of a long thread about October train strikes, so most will not see it.
https://community.ricksteves.com/travel-forum/italy/october-2024-italy-train-strikes
Here is a good summary of what happened. Basically there was electrical failure in early morning today at an intersection of tracks between Tiburtina and Roma Termini. It affected trains travel between Rome and Napoli, Milano, Firenze, and other places.
. https://www.swissinfo.ch/eng/italian-trains-disrupted-after-technical-glitch-in-rome/87661866