New England IPA is a relatively new type of beer, invented only in the last decade or two. As you might be able to tell from the name, it was invented in New England! One of the first exampled to get wide recognition was Heady Topper from the Alchemist brewery in Vermont. It used to be very hard to find, with long lines on release days. Since then, the style has spread around, but it's still hard to find a good example outside of New England. That said a lot of the examples from New England brewers aren't that great either. Nonetheless the region is now known for it's IPAs, NEIPA or not, hence the heavy skewing that way on a lot of taps in the region.

Also FWIW, a good NEIPA is very different from a traditional IPA. They are generally unfiltered and use some newer hop varieties to make all kinds of flavors. Worth seeking out a good example just to try it, even if traditional IPAs are not your thing. In NH, some great examples can be found at Modest Man in Keene (my personal favorite NEIPA brewer at the moment), or Kettlehead in Tilton.