Baby not taking formula

Allee

Hello there, FTM here and my baby is 8 months and is EBF. I feel my supply has gone down and trying formula. He is rejecting the bottle every time, I have tried every method I can but no that dint work.

I feel he is not getting enough milk but is good with solids and everything. When I pump I am getting like 1 or 2 oz. And when he is breastfed I can feel he is swallowing good amount of milk( not crying). I am totally 😐 confused