Simple Skin Shader?

I am trying to create a very simplified Skin Shader with an option to control the intensity of SubSurface Scattering.

I was able to find the following documentation for UE4.

When I replicate the shader exactly the same, based on this shader network:

Unfortunately, the Subsurface Amount doesn’t result in any changes to the shader.
I am not sure what I am missing here or if there was a substantial change when using UE5.

Thanks for any little help, ideas and thoughts. I really appreciate that.