[Xiaomi Redmi Note 5 Pro Questions & Answers] BloodyHair:
I have a bricked Redmi Note 5 Pro. Stock firmware, locked bootloader, did literally nothing that would cause this. Just updated firmware (it happened few years ago, just now decided to try and repair it), and after update It's stuck in Mi-Recovery 3.0, with options only for "Reboot", "Wipe Data" and "Connect with MIAssistant", with red text at the bottom "This MIUI version can't be installed on this device" (see photo). Tried everything form this menu, nothing solves the problem. I can boot into fastboot but can't use it as the bootloader is locked and debugging is off. I can go into EDL mode but can't flash as I need to log in into Mi Account, and my sister (this phone was hers) forgot the password and even the account which was connected to this device. I was looking for MiFlash that bypasses authorization but can't find any that is not marked as malware (anyone knows of any that is safe?). At was past the warranty and I've tried to ask few phone-repair shops but the said that is unrepairable.

Any ideas what I can check or try next to solve this problem?

BTW. Does anyone knows why all of this happened? As I already said, never did anything with OS, only updated it which caused brick. My only idea is, as this phone was bought not from official store, that it might be a phone that was bought cheaper in china, then flashed with modified global OS and after update it was replaced with official global OS which bricked the phone. No idea if something like this is possible.

Edit [Sep 19, 2021]: I got somewhere. Used Firehose file to flash whyred global image without authenitcation. Got into system. I can at least go into fastboot and it's detected correctly in windows. Now I'm trying to get root, flash TWRP and any non-stock OS. Couldn't flash directly via fastboot because of anti-rollback check. Tried to do "fastboot boot twrp_rn5pro.img" which resulted in FAIL in console (status read failed - too many links) and "The system has been destroyed - click the power button to shutdown".

Edit2 [Sep 19, 2021]: Looks like my bootloader is still locked and that's why I can't flash custom recovery. But when I look in the phone settings it says that my phone is already unlocked. Checking in fastboot via PC says otherwise. Enabled OEM unlocking, but fastboot still says "FAILED (remote: Token Verify Failed, Reboot the device". Can't unlock it using MiUnlock cause they say that I need to set my account as available to unlock in unlock status on my device, but I can't do it as my device says that it's already unlocked.

Edit3 [Sep 20, 2021]: I've tried other tool: XiaoMiTool V2 (by Francesco Tescari). As the option "My device works normally I want to mod it" didn't work I chose "My device is bricked I want to unbrick it". Selected option without unlocking bootloader (wouldn't work). And it actually auto-detected that it's chinese phone and flashed chinese OS (MIUI 10.3 Stable). At the boot I got a prompt that this device is locked and I need to log into my Mi account (the one I logged in in the last ROM - from first Edit), after logging in it let me go through setup (luckily there was English). But phone still says that it's unlocked while it's still locked in fastboot. So in the end it didn't got me anywhere, but at least I know that orginally it was a chinese phone.

Edit4 [Sep 20, 2021]: Finally solved the problem! Used this tutorial. Did everything like shown on video and at the end I have MIUI 12 with unlocked bootloader (this time it's actually unlocked - checked with fastboot). Managed to flash TWRP using dummy.img and flashing to recovery. Couldn't boot from img, but vol+ + power did the job. With working recovery I can do everything else I wanted to do.