Would it be possible to add a passcode in order to add or remove a manual DNS configuration?

Systems like OpenDNS are basically rendered useless on iPhones and iPads because you can just go into settings and remove the manual configuration. Would it be possible to maybe add a feature (like on Mac) where you need a passcode (maybe the same passcode for screen time) to access the DNS configuration? Thank you!

Would it be possible to add a passcode in order to add or remove a manual DNS configuration?
 
 
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