you probably know better than me and been with a Tesla in Italy more than me for sure (September sounds the right time to go back home when all the Dutch are not there anymore
) but since I'm Italian I will give my 2 cents on plugs in Italy.
In "old" Italian houses there are usually 2 electrical circuits with different plugs available: 10A and 16A, the voltage should be 240V but as you know we are a big country with a lot of rural areas and voltage stability is definitely not great, you can easily find it fluctuating, even 200/210V.
In new buildings is much easier to find at least 1 or 2 Shuko or Industrial (3 pin blue) connectors, because we found out that having our own plug compared to the rest of Europe was quite a stupid idea
Schuko > Italian adaptors are sold basically everywhere for few euros and there are two types:
10A:
16A:
The main difference is in the distance between and the size of the pins of the plug.
Be careful, the majority of these adaptors (especially the 10A) are rated for 1500W max, they can't sustain high loads for a long period of time.
It is usually written inside the schuko side. In that case, a max of 6A is possible otherwise it will literally melt the adaptor.
Also remember, normal houses in Italy have 3kW supply from the utility provider, if you want to have 4,5 or 6kW you have to pay more. It's a typical Italian pain to not be able to run the washing machine, iron, and dry your hair at the same time because the power goes out... charging a car takes a good % of that power so if someone turns on the oven... you will hear screams
3phase power is really not common in normal housing and garages, it's usually only available where you have industrial stuff or big restaurant kitchens.
So long story short, consider 220V power only for emergency trickle charging, the EV situation is getting better every year (no *sugar*, in Lombardy you get up 18.000eur off if you change from an old car to a BEV) so let's hope the infrastructure will grow as well, if they can fight Italian bureaucracy...
I hope this was useful, and enjoy the lovely sunny country for me as well!