MDM is different from iCloud/Activation Lock - MDM is easily bypassable, it’s just a company lock

But the iPhone X is checkm8able, so that’s probably what happened to that one

Which iPhone? If it’s older than an XS it’s possible otherwise no

It works, she just doesn’t want you tracking her all the time so turned it off

It’s just a bug, what’s scary about it?

No, it wasn’t updated for your screen size

Adguard DNS is the one I use, just need to download their app and follow it’s instructions: https://adguard-dns.io/en/welcome.html

DNS is much easier than the VPN method

Get an adblocker

They probably watched you tap your PIN in at some point

There are no ways to jailbreak an iPhone 14, the YouTube videos are scams (anything above iOS 16 on modern phones isn’t able to jailbreak )