Add family to account
How can I add family to my Apple credit card
Question marked as
It’s really fairly easy. Just make sure that your iPhone and any Participants (Authorized Users) and co-owner you invite have their iPhones updated to the latest iOS first. This is very important.
Update iOS on iPhone - Apple Support
After you have verified that all the devices have been updated, please follow the link to the support article below.
Set up Apple Card Family and add a co-owner and participants - Apple Support
The article below may be informative as well.
Build credit history for Apple Card Family participants - Apple Support