It shouldn't matter. Page on Community checks age of Xiaomi Account (not Community account), so it wouldn't allow to apply for unlocking permissions, if the account exists for less than 30 days...
Flash modem and modemfirmware images from Global ROM. Unpack this package, boot phone to Fastboot mode and run script.
https://miuipolska.pl/d/xiaomi.eu/modem/houji_global.zip