iphone 12 factory reset
how to factory reset iphone12 while it being disabled
Question marked as
If you mean that it is telling you the phone is disabled then
iPhone Unavailable, Security Lockout, or Disabled
You can sometimes remedy this without a computer if on iOS 15.2 or later by tapping on "erase iPhone" , but you will still need the Apple ID password. It will WIPE the phone, no choice!
How to remove your iPhone, iPad, or iPod touch passcode without a computer - Apple Support
video
ios 15.1 and earlier:
If you've forgotten your iPhone passcode – Apple Support (UK)
If you mean the phone is broken/kaput/dead then you cannot do that but the data is inaccessible to anyone