Here are all the build tests for the Redmi Note 9 (Merlin)
Predator Stormbreaker Kernel - Fast, Battery-Friendly & Efficient!
RyZeN but not powered by AMD
Pixel Ports by Cody47 for Redmi Note 7/7s [Lavender]
Gagan Malvi // TheAcanthite
I am hear to help you out so stay hera with me i provide you my best
Port of OxygenOS from OnePlus (6|7) to Redmi Note 7
Paragon Scape
Clarity Kernel for Xiaomi Devices (Mido and Lavender)