Bringing my supply back up after lip tie is fixed

So I was breast feeding and pumping. I had over 100 oz saved in my freezer from pumping and I was so proud! Then all of a sudden my supply started to go down. From 5 oz every session to roughly one and a half each pumping session. Breast feeding makes him angry because he isn’t getting enough to eat at a time.. at two months old he is now eating 4-6 oz at a time. I spoke with a lactation consultant and a dentist who both told me he has a pretty significant lip tie and that’s why he can’t stay latched. We have gone through our entire freezer stash and have started to have to supplement with formula. Anyone with experience breast feeding and lip ties? I’m hoping after we get it corrected on the 25th that I can start fully breast feeding again and that my supply will eventually be back up to where he is able to feed from me or a pumped bottle only..