My little boy didn't start smiling until he was at least 8 weeks. I don't think 🤔 I'm sure there is nothing to worry about ☺️
My son didn’t smile for the first time until he was about three months old remember pediatricians go by a guideline base that doesn’t necessarily mean that your child is gonna do that in that time span it can vary from child to child every baby is different
My youngest didn’t smile for ages and ages. I can’t remember how old he was but it was defo after 7 weeks. He’s now 2 and is laughing and giggling all the time. Don’t worry about it