The standard home contract in Italy is 3.3kW, at 230V it's less that 15 amps for a resistive load. The meter will allow you to go over the allotted power for some time before disconnecting you though (the amount of time is inversely proportional to how much your going over, and I don't think you can ever go over 4kW).

Heating and stoves are gas based (ovens usually not though); going over the limit is not usual, the only common problem is when using air conditioning in summer which is becoming more widespread, and so are higher power contracts (we're not talking more than 6kW, though).

According to my utility, I consume annually 2660kWh, that is 300W average, much less than the 1.2KW for an American household.

Note that for home contracts the limit (and billing) is on power, not amps, so using inductive or reactive loads will not penalize you.

Remember there are some Europeans around running 240v ;) Also, at least on the bigger European cities, apartments and flats are more popular than houses, son usually the energy need is lower. And, of course, energy prices!

Here, in Madrid, most of my friends are running 10 to 20 amps. I'm an outlier, running 25amps (5.75 kW) because all my stuff is electric (water heater, cold/hot air conditioning, microwave, glass-ceramic stove...).

My Ryzen 5 desktop is consuming 0.3 to 0.5amps (being 50 to 120watts at 220V), supposing you're using 110volts your desktop computer must be a big gaming rig if it's consuming 350 to 550watts ;)

I checked now and the fuses are 15 A + 15 A, but the utility company disconnects me if I go over about 4 kW (18 A), or over 3.3 kW for more than a few minutes.

My sister-in-law has an induction stove, so she gets 40 A and the stove is connected directly to a separate bigger fuse.

It's 230 V so two of those but not all three indeed.

I don't have an electric hob but electric heater + dishwasher + oven certainly triggers the breaker.