if you see that the application limit quota has been reached, you need to wait until it resets at 00:00h China time and then click again on ( Apply for unlocking )
I have tried to unlock my Hyper OS several times at 0:00 China time. At 0:00 at the start of the runtime every day, it is displayed that the application data quota has already been reached. This week, the quota has increased from 19 to 23 days at 0:00 China time. And it makes no difference whether I try at 0:00 China time or at any other time. So Xiaomi is currently no longer allowing the bootloader to be unlocked. I am really annoyed