I’d like to change my child’s birthdate to the correct birthdate which he is 15.
I originally put my kids birthdate younger than he is so I could control apps. I’d now like to change it to his actual birthdate.
iPhone SE, iOS 16
This is Apple Support's article (link below) that may help:
Update the birth date associated with your Apple ID - Apple Support
If the teenager's birthdate is listed as being below 13 years, seems likely you will need to use the link in the article to contact Apple Support in order to change the birthdate.