Mine didn’t poo for a week initially - then we spoke to the doctor and used a windi to help her pass gas and poo. Though the doctor did mention it’s normal as long as they are pee-ing on time and passing gas you should be good.
when my LO was this age he didnt pop for 4 days, i went doctors cause i had the same concerns, they doctor said cause babies are lay down mosty all the time it can be hatd for them to poo. also my health visiter second this, hes now 3 months and pooing eveyday. but if your concern go to the doctors x
They should be having atleast one a day! If he hasn’t had one for a few days and he’s irritated please see a doctor! Just in case x