Hi All. FYI I arrived in Rome yesterday from Canada. I had submitted my vaccine proof and the PLU (passenger locator form) digitally to the airline 72 hours prior to leaving. At layover in Munich I was asked for passport and vaccine proof before entering to the connecting gate. In Italy because everything had been entered digitally nothing further was required. I was fully prepared with every form imaginable on my person lol but it was a breeze.
Will update as I head out and about.