In 2018, Huawei officially stopped providing bootloader unlock codes to users. Without an unlocked bootloader, you cannot flash a custom recovery or a custom ROM.
SuperCharge (22.5W) might fall back to standard fast charging speeds depending on the GSI kernel compatibility. Conclusion: Is it Worth It? Nova 5t Custom Rom
If your chosen ROM does not include Google apps, transfer and flash a compatible (like NikGApps) immediately after the ROM. Step 5: Format Data and Reboot Go back to the main menu of TWRP. Nova 5t Custom Rom