Got my Redmi Note 9 Pro around start of 2021, since receiving MIUI 12.0.3 i never updated from there, there are no packages whatsoever to download, tried talking to the assistence and...
Info about gauguin | LineageOS Wiki
Install LineageOS 19 on Mi 10T Lite/Mi 10i/Redmi Note 9 Pro 5G
Official Lineage OS 20.0 for Poco M2 Pro/Redmi Note 9S/ Pro/Max Review - What's New!! - YouTube
Great battery life on Redmi note 9 pro with costum rom much better than stock,even tho the phone is 2 years old.What is your experience with costum roms in terms of battery