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
Samsung Galaxy Note 4 camera review: Digital Photography Review
ROM][7.0][TW][Exynos][Stable]Refined Nougat N7FE Port 6.0 | XDA Forums
Samsung Galaxy Note 4 Stock Apps Download
Samsung Galaxy Note 4 - Wikipedia
Download Samsung Galaxy Note 4 Apps APKs
New Android 5.0.1 N910FXXU1BOC3 official build for Galaxy Note 4 bundles lots of goodies [How to install]