3 months pp not producing enough BM

Cynthia

so, I breast feed and formula feed my baby but, but I’m not producing as much breast milk as I used to. I usually just breast feed at night since my boobs are the fullest then and during the day I give her formula. I used to pump regularly but now I never do 😭 what can I do to boost my supply up a lot like how it used to be naturally without supplements? I want to be able to breast feed all times of the day and not feel like my breast milk is all dried up. Goal is to make it until she is 6 months