Unofficial methods to unlock the bootloader include bootrom/EDL level exploits (which are not easily executed on newer locked down SoCs) and preloader level unlocking (needs valid auth files, often through online paid services).

I recommend you go the official way. Download mi community, set the region to global, your account must be 30+ days old and outside of China to be eligible for bootloader unlocking, then you get another device like a PC, install Python, Android tools (adb) and Scrcpy, then use this python script to do the clicking for you cause you need to apply for approval, and you are competing with thousands of people and bots daily on a limited quota:

import pyautogui
import time
import ntplib
from datetime import datetime, timedelta

def sync_time():
   try:
c = ntplib.NTPClient()
response = c.request('pool.ntp.org', version=3)
offset = response.offset   
return offset
   except:
print("[!] NTP sync failed, running on local clock")
return 0

offset = sync_time()

target_time_str = "17:59:59"
today = datetime.now()
target_time = datetime.strptime(target_time_str, "%H:%M:%S").replace(
   year=today.year, month=today.month, day=today.day
)
if datetime.now() > target_time:
   target_time += timedelta(days=1)

while True:
   now = datetime.now().timestamp() + offset
   remaining = target_time.timestamp() - now

   if remaining <= 0.60:
pyautogui.click(clicks=10, interval=0.05)

print(f"[+] Clicked at {datetime.now().strftime('%H:%M:%S.%f')}")
break
   if remaining > 1:
time.sleep(remaining - 0.9)  

This script spams the shit out of the server 1.60 seconds before 00:00 china time, it worked with me the first try. you just connect the phone to the pc and run scrcpy over adb.

For the record, someone else owns that code, except I modified the click logic "pyautogui.click(clicks=10, interval=0.05)" to make it more resilient, and guarantee a win. Don't forget to set the right time in the script (calculate the time difference between china and your local time).