Hello duckyjp,
It sounds like you're having some issues with Screen Time and a specific app. We will be happy to assist you.
Let's try some steps to see if they help:
- First, let's back up that device.
How to back up your iPhone, iPad, and iPod touch
Next, delete the app and restart your device and the child's device:
How to delete apps on your iPhone, iPad, and iPod touch
Restart your iPhone, iPad, or iPod touch
Install the app back on to the kid's device and set parental controls once more.
If that doesn’t help, turn off Screen Time and parental controls on the iPhone in Settings > Screen Time.
Restart once more, turn parental controls back on and set it up:
Use parental controls on your child's iPhone, iPad, and iPod touch
We hope this helps!
Cheers!