FSR 3 code is now open source and available on GitHub
Today, AMD has shared the news that their newly developed version of FSR, FSR 3, is now available as an open source project based under an MIT license for game developers to include into their gaming titles, with compatibility with DirectX12 and Unreal Engine 5, and while Vulkan is currently not supported for FSR3, AMD mentioned that they are working on bringing support for it.
Currently, FSR3 is supported in games like Cyberpunk 2077, Starfield and Starship Troopers: Extermination, and with FSR3 becoming open source, we can only expect this list of titles to grow and expand to more popular franchises.
Source
FSR 3 Overview
FSR 3 GitHub repository