Formula baby won’t poop

My daughter is 5 months old she’s formula fed at that age she pooped every 2 days but did have some issues when she was a month old constipation but now she poops 2 times a day but sometimes she will go every second day, it’s good to check with ur doctor but as long as ur having 6-8 wet nappies a day it should be fine

At one week old you should be having several wet and dirty diapers a day. Later on not pooping is normal but this early I would call the doctor right away and see what they say.