I am almost sure it’s also in Italy. But gf is sleeping. Can’t ask.

Edit: Ok, I woke her up and it’s a bit more complicated. You usually say things like Pizza con “ingredient” or Pizza alla “stuff”. There are some pizzas that a famous and these are called Pizza “Name”. So, if the country of Italy ever would accept the existence of Pizza Hawaii, it would be called that.

Damn, just when you are about to forgive a country for their misdeeds.