The DHL A300 did not loose its port wingtip, it lost the outer 2 flaps. The aileron stayed on the wing Cockpit controls effect would have been the same if on an A320 ie zilch.
Ah, so an extended part of wingtip was directly damaged. But the cockpit controls were affected in the sense that, e. g. the structurally intact elevator, rudder and opposite wing were not controllable because of no hydraulic fluids.