You only know about the ones in New York City that are still around. Lots of parts of New York were "white prole" in the same era as the LA areas you cite (say, up to the 1960s or 70s) but aren't any more, including some of the most beaten down parts of New York City (much of the northern and eastern Bronx and eastern Brooklyn were still "white prole" into the 60s and 70s), some neighborhoods that have massively gentrified (such as Greenpoint or Carroll Gardens) and some neighborhoods that have become not "white prole" relatively recently (Canarsie, Flushing, Woodhaven) or are currently in the process of becoming not "white prole" (Bensonhurst, Richmond Hill, pretty much all of NE Queens). And the ones that aren't changing, or aren't changing so fast, are the ones that either were always wealthy or became wealthy; somewhere like Dyker Heights is much more like Huntington Beach than Huntington Park.
Also, I have no idea where you would be drawing five Republican congressional districts in NYC and immediate surrounds. You can gerrymander in two safe districts and maybe make a third around Biden+10.
5 is basically impossible, but you can get 4 pretty R leaning districts between SI, South Brooklyn, whiter parts of Hempstead, and Suffolk counties.
https://projects.fivethirtyeight.com/redistricting-2022-maps/new-york/remedial-proposal/Here's a good example. NY-01, NY-02, NY-04, and NY-11 all voted for Trump in 2020
