Device name：Redmi K40 Pro/Pro+/ Mi 11i / Mi 11X Pro

Codename：haydn

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 K40 Pro/Pro+/ Mi 11i / Mi 11X Pro(haydn) - MIUI Official ROMs