HUAWEI NOVA 2 PLUS (BAC-AL00 -> BAC-L21) CONVERT AND HUAWEI ID REMOVE
1. Downgrade using Resurrector with TP and BAC-Downgrade-Board-1024.fcff
2. Changed Model/Vendor/Country to BAC-L21/hw/meafnaf with FlyCaptain
3. Flash BAC-L21 18.104.22.1680 firmware (low version for repair purposes) in UPGRADE mode with Resurrector (you probably will have white error screen after this step, if not skip to step 5)
4. Flash again BAC-L21 22.214.171.1240 firmware in FASTBOOT MODE using Resurrector (it will write recovery partitions in fastboot and change phone to upgrade mode atomatically to complete flashing process)
5. Remove Huawei ID with FlyCaptain
6. Optional upgrade phone to last firmware available.