While LineageOS is the most popular option in modding, there are many great alternatives. One of them is Paranoid Android which was updated to Android 12 last November.
The Paranoid Android team has since started releasing Android 12-based Sapphire Alpha builds for a number of smartphones and is now bringing the latest Android version to a few other devices.
Paranoid Android brings Android 12 to POCO F1, Xiaomi Mi 8, Mi MIX 2S and Remi Note 7 Pro
The Android 12-based Paranoid Sapphire Alpha builds are now available for the POCOPHONE F1, Xiaomi Mi 8, Mi MIX 2s and Redmi Note 7 Pro smartphones.
If you are interested in trying the custom ROM, find the download links and detailed installation instructions below, bearing in mind that since this is an initial version, the overall software experience may be unstable and incomplete.
Paranoid Android releases Sapphire Alpha 2 for OnePlus 7 Pro, OnePlus 7T and OnePlus 7T Pro
In related news, the Paranoid Android team released Sapphire Alpha 2 builds for the OnePlus 7 Pro, OnePlus 7T, and OnePlus 7T Pro. The latest version addresses many known issues and further refines the overall user experience. Here is the link.
As usual, we remind you that before installing the custom ROM on your smartphone, we recommend that you carefully read all the information in the Wiki, as the operation is not without risks.