There are a series of airport strikes planned for various dates in September at which will seriously delay or cancel some flights. EasyJet is also having a 24 stoppage at Catania airport. Trains and other public transport will also be affected in various Italian provinces, September 6th is confirmed for a national strike.
I'm going to Fiumicino (Rome) myself in September and there is something happening on 14th which is our departure date, but it seems to affect Milan at the moment. But I suppose "be prepared" is the motto now.
https://www.idealista.it/en/news/lifestyle-in-italy/2025/08/20/263370-italy-transport-strikes-september-dates-set-for-travel-disruption