Account set and paired to the phone.
@chromiumos-guy Honestly I didn't understand a word
@kln_nurv The last link provided by @wally states "At the end of 2024, Xiaomi will start to check the regions in which your Mi account is used. For example, if your phone or tablet is designed for the Chinese domestic market, you will only be able to unlock the bootloader with a Chinese account.
If you try to unlock the bootloader of a Chinese phone from a global account, you’ll get an error: ‘The place where the account is registered does not match the place where the phone is sold’."
I hope Global accounts don't have the weird limitations you mentioned.
The MiUnlock version from the Ubports devices site didn't work properly in my laptop, so I downloaded the last version from the last link provided by @wally. I can launch the app but cannot connect to the phone. "Mi Unlock not connected to the phone. Possible driver issue or incorrect application folder name. Also possible bad smartphone-PC connection due to poor quality cable." I guess it is the cable.
I realized that i skipped "Submitting an application through the Mi Community app.". Is it necessary?