Re-Lock the bootloader on global rom in chinese based phones

Hello everyone...As you know the HyperOS will not be available for people who have their bootloader unlocked and u should lock the boot loader to recieve the upgrade.....I brought a chinese Note 12 pro 5g chipped with a global rom ,I'm assuming that the seller flash it without unlocking the bootloader so it ends me with a system with no OTA updates so i came with an idea to unlock the bootloader and flashing my phone with an official global rom and then re-lock the bootloader...So my Question is

Is this Approach is correct ?? Did anyone try this method before on this phone ??

(See pictures below for more infos)

https://preview.redd.it/tlu4xbga009c1.jpg?width=1080&format=pjpg&auto=webp&s=17dad1456041625da5a7d3ca20205f390fc5fd62

https://preview.redd.it/k2mjodga009c1.jpg?width=576&format=pjpg&auto=webp&s=3b9a7f248b2917ec0e232ef67fcb46a707eee023

https://preview.redd.it/6duq8fga009c1.jpg?width=720&format=pjpg&auto=webp&s=d34ac4169831ae4d75f197dad7d0e2470a34b24f

https://preview.redd.it/8xrdlhga009c1.jpg?width=986&format=pjpg&auto=webp&s=c1d72737f8d5a96f256b86ea7312a3b93893e87b