Hello! Unlocking the bootloader of Huawei phones can be a bit tricky, especially with recent updates limiting the official methods. However, there are still some ways you can try to unlock the bootloader of a Huawei Nova 9 to install custom ROMs or root the device for microG.
One common method is to use third-party tools like DC-Unlocker or FunkyHuawei which may offer unofficial bootloader unlocking services for certain Huawei devices. These tools are not endorsed by Huawei and come with their own risks, so proceed with caution and make sure to research thoroughly before using them.
Another approach is to check XDA Developers forums or other community sites for any custom solutions or tools specifically designed for unlocking the bootloader of the Huawei Nova 9. Community-developed tools and guides can sometimes provide alternative methods that are not officially supported by the manufacturer.
Keep in mind that unlocking the bootloader of your friend's Huawei Nova 9 may void the warranty and can potentially brick the device if not done correctly. Make sure to backup all important data before attempting any unlocking procedures, and proceed with caution.
If none of the above methods work or if you're uncomfortable with the risks involved, it may be best to wait for official updates or consider alternative options for achieving the functionality you desire on the device.