It’s exactly that! I should have specified a ‘long shank’ hackamore- aka weird amalgam of a hackamore and a standard bit. They do exist but they’re pretty rare, as far as I’ve seen, and maybe they go by other names as well. The shank provides leverage as with a curb bit, but instead of applying pressure on the bar inside the mouth, it applies pressure on the noseband. It’s a little more advanced than a standard hackamore. For horses that neck rein, they can be a nice, mild alternative to a curb bit (I just like not having to mess with a slobbery bit.)