Already moved to C++/WinRT and WinUI3! The Win11 Settings page featured in this article clearly uses some WinUI 3 components and the link towards the bottom is

Already moved to C++/WinRT and WinUI3! The Win11 Settings page featured in this article clearly uses some WinUI 3 components and the link towards the bottom is to an article on the C++/WinRT "turbo" bindings support available in React Native for some time now.