Baby hates bottle - not getting enough

Rachel

My 3 month old had weight gain issues early on because he had a weak suck so we had to add in bottles/formula. That messed up my supply and I don’t make enough milk now but I still breastfeed so he can get some breastmilk and supplement as needed. Lately my LO is refusing formula and the bottle almost all together. I wanna make sure he’s getting enough, has anyone had this happen? What did you do?