I am breastfeeding and my daughter is 2 weeks old but my breast milk still not full even I still…

I am breastfeeding and my daughter is 2 weeks old but my breast milk still not full even I still breastfeeding and milk come out very lil bit. any suggestions how can I make my breast to become full milk and alot feed to my daughter. right now mostly use formula cuz my breast milk is not enough to feed? help me please thanks :-(