How to increase LO intake with breastfeeding

NJshore40

how can I help my 2 monthnLO increase how much he gets from breastfeeding?

LO had weight gaining issues. We had tongue clipped,  dropped nipple shield after procedure, and he is latching welll. I have a good supply bc i pump enough to suppliment( weighted feedings) so supply isnt the issue.  He has been capable of getting upwards of 4 oz, but mstly gets 2 oz average.  I am using pumped milk to suppliment when he does not get enough. Would love to not have to pump to suppliment.

Any thing i can try to  help his intake increase?