Scenario in short:
I’m trying to install LineageOS onto a spare phone that I have (redmi note 8T) Hoping to get a daily driver out of it. The installation process requires me to install Android11 to install lineage on top of /over that. Which afaik isn’t directly available outside of some websites that I’ve never heard of.
For safety’s sake: would the install of lineage wipe the install of Android11? Or could there still remain backdoors?


Thanks.
As other people people already guessed this is needed because more recent versions of the Stock OS won’t let you install a Custom rom.
After you’re done the old stock OS will be replaced fully by lineageOS.