LineageOS is a free, community built, aftermarket firmware distribution of Android , which is designed to increase performance and reliability over stock Android for your device.
LineageOS is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed.
All Core Features of Android 12.1 Works , Including Wireless Display, Hotspot,Screen recording.
SELinux Status Enforcing.
CTS Passes without Root.
Note : All development of these amazing ROMs is done by Zeelog. The OP anandsvm is tester ,provide assistance and collect and submit bug reports.
GitHub/OTA Release : Link
Dev Profile : Link
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LineageOS 19.1 By Zeelog, ROM for the Xiaomi Redmi Note 4
ROM OS Version: Android 12.1.0_r2
ROM Kernel: Linux 4.9
ROM Firmware Required: Latest Firmware V22.214.171.124.NCFMIXM
Stable Release Date: 2022-03-28