Device name:Redmi 12 / 12R 5G / Redmi Note 12R / POCO M6 Pro 5G
Codename:sky
Bootloader:You need to unlock the bootloader if you want to flash a rom into your phone via fastboot method, and your data could be deleted as you choose, please make sure you have backed up your personal data. , Apply for Bootloader Unlock here.
MIUI Roms:Yes , go to the MIUI site: Redmi 12 / 12R 5G / Redmi Note 12R / POCO M6 Pro 5G(sky) - MIUI Official ROMs