"Ryanair (blah blah) announced that it would restore all its Italian domestic flights – without interruption – from January 23rd next, as Ryanair and ENAC today reached agreement that all passengers intending to travel on Ryanair’s domestic Italian flights will provide either a passport or valid EU/EEA National Identity Card in full compliance with the security requirements, which apply on all Ryanair flights across the EU."
So NO CHANGE from current rules then.