iCloud locked phones are literally impossible to open for the general public. Like everyone that says they can bypass it are most likely scammers. The previous owner should remove the device from it's "Find my devices", in order to bypass it. Gn, andande (very rarely) there are very expensive tools like GrayKey.... they are used by forensic teams mnamn, ena they're basically iOS patches. I'd pay anything if any of the typical iCloud enkeftalen guys make it past the activation lock screen