Family Sharing - Apple ID sign out restrictions & problems with child accepting invitation

Hi DSAC67,

The following steps address what you're describing specifically, and should provide a solution:

"Approve the request

If you're the child's current family organizer, you receive a notification after an organizer from another family group invites the child to join their family. You can approve from the notification or use these steps. After you approve, the child moves from your family group to the other family group. 

Learn what happens after a family member leaves

On your iPhone, iPad, or iPod touch

1. If the child uses Apple Card Family or Apple Cash Family, close the child's Apple Cash account and remove them from the shared Apple Card account.
2. If you set up an Apple Watch for the child, use the Watch app on your iPhone or iPad to remove the device. The new parent or guardian can set up the watch in their family group later.
3. To approve the invite, go to Settings. 
4. Below your name, find a notification that says "Family Transfer Request." 
5. Tap the notification and follow the onscreen instructions."

You can find these steps along with other information that may be helpful, here: Move a child to another group using Family Sharing - Apple Support

If you have followed the steps correctly and you still have the issue, let us know if you get any specific alerts or error messages when trying, as those may help us determine what might be causing the issue.

We also recommend restarting your device and keeping it updated as those steps assure you have cleared out any minor software issues and are running the most current version.

Restart your iPhone - Apple Support

Update your iPhone or iPad - Apple Support

If you still have questions, reach out to Apple Support directly, as this may require closer guidance: Get Support

Cheers!