Unable to restrict Personal Hotspot option via Screen Time

It seems there is no option to completely disable Personal Hotspot or remove it from Settings.

This is a requirement for parents so we can stop our children sharing their mobile data via personal hotspot to other devices in order to bypass screen time restricted we set on their devices.

I have spoken to apple support and they passed the buck to mobile carrier. I have spoken to mobile carrier and they told me this is a setting on the device and they cannot do anything about it, so go figure.

Apple when are you going to stop serving half cooked meals ? you provide a facility to parents to manage their child devices yet you do not cross the t's and dot the i's .... how is this missed ?

I have searched online and there are many parents complaining about the same very thing...

Why we do not have the option to disable "Personal Hotspot" on our child devices ?

And please don't put any links about going to Content and Restrictions > Mobile Data > option ... as that option is only for setting the restriction on managing the list of application which can access mobile data or not.

What we are asking for is plain simple! Give us an option to ENABLE / DISABLE > "PERSONAL HOTSPOT" via screen time settings, so we can deal with smart 12 year olds who bypassing the logic your highly paid genius engineers put in the Screen Time.