Family sharing for adding to, for an existing child Apple ID
My child had screentime setting on his iPhone 8 but I would like to control it remotely. Hence decided to start using family share for this and also to get regular reports on his screentime usage.
I tried to add my child's existing Apple ID to my Family sharing, his profile has only 2 options(adult or Guardian/Parent). I am unable to mark him as Child. I am unable to control his account.
I tried the otherway and tried to add me from his phone, I was able to add and then change my profile as guardian/parent. After this I am unable to control his account as he is marked as the organiser.
So with both attempts, I am unable to control my child's phone usage. What am I doing wrong? I haven't tried creating a new child account since he has been using his Apple ID for a few years already and this option seems to be unreasonable. Both my child's and my phones have the latest IOS 14.4
Any advice/suggestions/experience is welcome.
iPhone 11