Evolution X : Best Rom for Gaming and Battery Life on S9 Exynos! - YouTube
This is Noble rom, an android 12 custom rom for the Galaxy Note 9 and S9 by AlexisXDA on XDA. It has some bugs but nothing that's deal breaker, some stuff have
Install Galaxy S9 and S9+ ROM with One UI 3.0 Applications - NaldoTech
Resurrection Remix ROM for Galaxy S9 or S9 Plus! [Android 8.1 Oreo + Root] - YouTube
One UI 3.1 Android 11 For Samsung S9 & S9 Plus. (Custom ROM). : r/GalaxyS9