Blender’s NPR (Non-Photorealistic Rendering) versions are special versions used to create stylized and artistic visuals. You can find NPR prototype versions on Blender’s official site. These versions include new features that may be added to future official releases.
Additionally, there are various NPR tools and shaders developed by the Blender NPR community that can be downloaded and used.
Blender NPR Downloads: https://builder.blender.org/download/experimental/npr-prototype/