I'm a complete beginner when it comes to shaders, I'm building a project and I need to use Shader Graph in it.
I would like to know if it is possible to render two different things on each side of a face, for example in the normal side render the texture and the normal maps and in the back of the face render a pure black without shadows or lights.

Well... I kind of figured a way to do it, I think that this isn't optimized at all, but it works flawlessly.
In the inspector I added a second material to the object and I created a new shader using the "Is Front Face" and the "Branch" node to set the normal faces transparent and the "back faces" to show the color I wanted