My knowledge is limited, but with the search function, I found this : https://xiaomi.eu/community/threads/mi-11-pro-stuck-on-fastboot.62027/post-617002regarding locking the bootloader, do you mean for this rom only? or the same with the official Indonesian rom or any other official rom regardless of region ?
if i kept it unlocked, some governmental apps here forbidding usage through such roms , if this will be the same here , then sadly i cant use the rom
It seems that you are limited to the phone region ROMs (but I may understand wrong)