MDM can be configured in 2 modes, one with company owned devices and one with bring your own device. But there are lots of settings that can be done, usually it is configured with work and personal profiles and the work one has all the restrictions in place and the personal has no limits. Maybe just some device features can be also enforced, like forbid the OEM unlock and ADB.

I wouldn’t trust the 12 years old me to decide a name for myself.