I can confirm this will work if you combine it with replacing the bootloader. If you forget to replace the bootloader, you will brick your device. I used this to flash xiaomi.eu on my Redmi Note 3 Pro (kenzo).
If anyone is interested in doing the same (flashing the xiaomi.eu ROMs without...
I have been waiting for 2 weeks to get an unlock code but I didn't receive anything. Then I followed a guide to do semi-unlock and flashed xiaomi.eu ROm 7.2.2 on my Redmi Note 3 Pro (kenzo).