I have spent the better part of my evening trying to figure this out but my efforts are futile. I am currently running a past(miui13) version of xiaomi.eu and decided to update to 14. I have managed to run fastboot correctly, install twrp which would upgrade my device "seamlessly". However, when completing the prompts from the updater, I reboot to the stock recovery and if I use fastboot to get to twrp, my data are encrypted and there is nothing I can do. I do not believe I have ever setup a pin for the encryption and all my usual pins simply do not work. I have read other posts having the same encryption issue, but I have not seen a solution.
I would prefer to not have to wipe my phone at this stage, if this is possible at all.
Thank you for your time.