Its common to have one breast produce more than the other . Try pumping longer on that one & have baby nurse more frequently on the slack breast
Pump output isn’t an indication of supply. Your baby removes milk more efficiently than any pump.
I know but when I pump to store in the freezer one bottle will full all the way up and other Brest will be about 2 oz
Feeding baby at breast is the best way to increase your milk also drinking lots of water.
Why do you think you need to increase your supply our bodies are amazing & they produce just what baby needs
Fenugreek vitamins helped me sooooo much!