Is this normal?

I just switched my 6 month old to formula after EBF and he’s doing very well but I’m not sure he’s getting enough. He’s a big boy and weighs around 10kg (22lbs) and averages around 30oz a day. He rarely finishes bottles and takes several 4oz bottles a day, with more in the morning and before bed. I’m just worried because I’m seeing guidelines that say 2.5oz per lb of body weight but this would mean he should be eating 55oz?? Surely that is too much? He doesn’t seem particularly hungry and I physically can’t get him to take more than he already does. We have also started solids and he’s a very good eater most days so could that also be replacing some milk feeds? I’m just so worried that he will start losing weight and my milk has more or less dried up now so it’s too late to switch back to breastfeeding.