Prevent Wifi from being turned off

Downtime is not the answer and doesn't prevent Settings OR wifi to be disabled. I am testing out Downtime on a phone running iOS 12 and it only restricts certain Apps but I still have access to Settings and Wifi. I am able to go into Settings and I have access to turn off Wifi or disconnect from a network.

When I go into Apps Limit and choose "All Apps & Categories", certain Apps will appear dark but visible and I can still click on the App to make it active again.

Downtime and Apps Limit doesn't resolve or restrict certain default settings in particular what I am trying to accomplish.

When you go to Settings-Wifi, you have the button to turn it OFF or ON. I want to prevent the user from either turn it off or prevent them from "Forget This Network" on the phone.

I understand this is something that cannot be changed but it would be helpful to include this in parental controls. In PC, you can restrict other settings and Apps but you can't restrict turning off Wifi. As a parent it would be helpful to include this setting when teens are at home using their phones.