: Huawei officially stopped providing bootloader unlock codes in 2018. Without an unlocked bootloader, you cannot flash a custom recovery (like TWRP) or a custom ROM.
Without bootloader unlock, no custom recovery (TWRP) or kernel can be flashed. Fastboot flashing unlock is disabled. Huawei’s Phone Unlock site was shut down in 2018. Nova 5t Custom Rom
For those who want to stay within the Huawei ecosystem but want the newest features, some regions offer HarmonyOS updates. some regions offer HarmonyOS updates.