My iPhone and my daughter's iPod both have iOS 9. I have tried to add her as a friend in Game Center using both her email address and her nickname. But nothing seems to work.
She has also sent a request to me. But nothing seems to get through.
I have read that game center does not allow adding friends in iOS 10. Does that mean it also doesn't work I iOS 9 now?
Note: my daughter is under 13 and we have entered her age as such. That does kind of limitations in some games. But I had not heard that it would block her from using Game Center friends.