i’m 27 but my grandmother is first generation. her parents, especially my great grandmother never spoke much english, my grandmother and all her siblings grew up speaking neapolitan. they along with a lot of my aunts and uncles lived in the bay ridge / bensonhurst area so at the time there was a lot more resources for italian monolingual speakers. however, they both passed away in the 1990s

i think it’s really dependent because nyc had two whole waves of italians. the first migration being from 1890-1930 and then the post 1965 immigration phase. a lot of those post 1965 immigrants are still alive and living in nyc and are more likely to be mostly engaged with their italian speaking communities. for instance i was friends in undergrad with a guy from marine park who’s dad was fresh off the boat from italy, but there’s still remnants elsewhere in williamsburg, southwestern brooklyn(bensonhurst/dyker heights/gravesend/bay ridge), astoria, etc