Second-hand iPhone inspection, flash the recovery mode and check whether it is more reliable

Without physical disassembly The iPhone enters recovery mode and flashes the official system ipsw complete package in recovery mode (reset). Then perform the activation inspection. Is it possible to expose the id lock and supervision lock hidden by cracking and tampering with the ios system to reduce the purchase risk? The tampering with the machine inspection software should also be carried out in ios, so can it also be exposed?