Device name：POCO M4 Pro 5G

Codename：evergreen

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: POCO M4 Pro 5G(evergreen) - MIUI Official ROMs