In my country not only Italian LE Agencies/Military calibers are ever banned, but either calibers used by foreign Armies.
Even 9x17 or 9 Short or 380 auto was banned in the Land of Sun up to 1985.
We got used 9x21 IMI instead of 9x19 Luger long time.
Only when U.S. Army adopted Beretta M9 we could carry 45 ACP instead of terrible 45 HP (Hirtemberg Patronen) that needed a special ring for chamber adjustment.
So if Law bans 9x19 there's 9x21, if bans 40 S&W there's 357 Sig, if rebans 45ACP ther's 45 GAP and why not 10 mm!