> They do allow to unlock their bootloaders

Kafka himself would be proud if their unlocking process[0], but technically sure, they allow it

> Press "Apply for unlocking" at exactly 12:00 AM GMT+8 (pressing it too late will cause the "application quota limit reached" error. Use this website to check the time) "Account Error" might show up. If that happens, retry after 10 days

[0] https://github.com/realdtn2/xiaomi-unlocking-rooting-guide