Is there a way to turn a child account into an adult account

Hi so my son has an account that im hooked up to as his parent account but he was trying to play apex with his cousin who has a ps4 and he couldnt create an apex account with his xbox account due to his account being a child account how would i fix that so they can play together

I think is a restriction of your son's account. In Xbox family should be something to resolve, but I'm not sure.

Once the birthdate has been entered while creating the Xbox account, that's it. It is permanent. You cannot change the birthdate of an Xbox account. You can only change a child account to an adult account once that account reaches 18yrs of age. Some games only have a child restrictions until 13 though.

Yes, but in the Xbox Family app I'think there's the preferences of their son's profile

Once the birthdate has been entered while creating the Xbox account, that's it. It is permanent. You cannot change the birthdate of an Xbox account. You can only change a child account to an adult account once that account reaches 18yrs of age. Some games only have a child restrictions until 13 though.

While you can change the preferences in family settings to control a childs privacy and such, some games or their publishers have their own restrictions based on the account age. That age is deterined by the age of the Xbox account. Your family preferences will not overide restrictions set by the game publishers or the service providers (Xbox). For example, I think it is EA that restricts some online content to 13yrs and older. That cannot be changed via family preferences.

The child account will be promoted to an adult account once you turn 18. There is no way around that restriction.