Formula questions

Hi ladies! So my little one just turned two months old. He has been EBF, but we had to put him on formula for a couple days due to breastmilk jaundice until his bilirubin levels come down. But I want to know how many ounces are your little ones drinking at each feeding & how often are they eating. Also he hasnt pooped for 12 hours since being on the formula. Is this okay? I've never had to give my kids formula so I feel like I dont know what I'm doing.