An A/C will generate lift as soon as the wing is rotated to a positive angle, so nose wheel lift off is the moment of first lift generation. Seconds later the aircraft leaves the ground at its highest weight for the flight. If you then closed the throttles the aircraft would be generating its maximum lift. Re-applying the power makes no difference to the total lift generated at the moment of unstick. Think about it!
All the pwer does is accelerate and contribute but it doesn't affect the maximum lift generated by the wing.