In May 2018, Huawei announced it would no longer provide unlock codes for any new devices. Since the Honor 8C launched in , it falls under this restriction.
Unlocking the bootloader on the Huawei Honor 8C is no longer a one-click process after Huawei shut down its official portal. However, with paid services like HCU-Calculator or DC-Unlocker, you can still achieve it without risking permanent damage. How to Unlock Bootloader in HUAWEI Honor 8C phone