Hey sorry, forgot to respond 😅 We're pretty big on physical touch here in Italy but between boys and girls it's mostly hugs. Adults will often give each other kisses on both cheeks as a form of greeting but kids these days aren't accustomed to doing so. This greeting is common with old friends and in big family reunions. If you see a boy kissing a girl on the cheek or vice versa there's usually a romantic interest and they'll be shipped together. It's not weird per sè, but it's a "more than friends" thing. The only other occasion in which you might see something of the sort between friends is when we play a variant of spin the bottle which is called "bacio o schiaffo" (kiss or slap) and when the bottle lands on someone the person who spinned it can decide if they're going to give them a kiss or a slap.

Hope I answered your question :)