Performing an iCloud check by serial number is a straightforward process:
An iCloud check reveals the status. If "Find My" is on, the Activation Lock is active. Buying a locked device carries several risks: Activation Lock for iPhone and iPad - Apple Support icloud check by serial number
Checking an iCloud (Activation Lock) status by serial number is essential when buying a used Apple device to ensure it isn't stolen or locked to a previous owner. While Apple previously offered a direct public tool for this, they removed it due to security concerns involving serial number spoofing. How to Check iCloud Status Performing an iCloud check by serial number is