Secure Folder is a type of redundant app, and its usage history cannot be monitored or blocked through Mobile Fence.

While the use of Secure Folder is automatically restricted when the MDM agent is activated, you can manually block (hide) it as follows if it is not automatically disabled.

1) On the child's device, go to Settings → Lock screen and security

2) Secure Folder

If you are prompted for a password at this point, you must ask your child for the password and enter it to proceed to the next screen.

3) "Show Secure Folder" → Disable