F-35 can be fitted with LAU-151/A external rail launchers to increase its missile payloads, especially useful to shoot the hundreds of incoming Iranian cruise missiles and drones attacking Israel. External launchers became necessary to increase missile payloads due to the huge number of drones.
However, note that F-35 does not have a pylon on its wing tip, the external missile launchers and the pylons were under the wing. Though F-35C has a hardpoint under the wing very close to the wing tip, but that is not a true wing tip pylon.