Are you confusing the Find My iPhone feature or Activation Lock? None of these depend on the SIM besides a SIM change triggering a re-check of the activation l

Are you confusing the Find My iPhone feature or Activation Lock? None of these depend on the SIM besides a SIM change triggering a re-check of the activation lock status (it’ll just ask you for your Apple ID credentials). Carrier lock is not something the user has easy visibility on (until recently it wasn’t even possible to tell which carrier a phone was locked to without trying them all) and definitely no control over.