Is the grappling strike maneuver a part of an attack or used after the hit?

Battlemaster says

Maneuvers. You learn three maneuvers of your choice, which are listed under "Maneuvers" below. Many maneuvers enhance an attack in some way. You can use only one maneuver per attack.

but unlike other maneuvers, grappling strike uses "immediately after you hit" instead of "when you hit"

Is grappling strike limited to the one maneuver per attack clause?