In every process, you might encounter a few challenges. The same applies with the same method that the Xiaomi uses to unlock their bootloaders. Even so, there is always a way to get on smoothly.
While the process was often buggy and with so many steps, right now, it is streamlined, and the only thing Xiaomi needs to know is that you are the owner of the device that you want to unlock.
Again, waiting for the confirmation message for two or three days might seem like a lot of time. But with some level of patience, the process will feel easy and smooth. Unlike before, when you had to wait for weeks, a few days is nothing at much.