You add them yourself when making a shader with Shader Graph.
Add a Texture2D property to the shader on the blackboard. Set the default texture to ‘bump’.
Drag that into the node graph area.
Add a Sample Texture 2D node and attach the texture property node to it. Set the type to ‘Normal’.
Add a Float property to the blackboard. Set it to be a Range going from 0.0 to 1.0.
Drag that into the node graph area.
Add a Normal Strength node.
Attach the RGBA output of the Sample Texture 2D node and that float property to the Normal Strength node.
Attach the output of the Normal Strength to the Tangent Space normal on the master stack.
That gets you the Normal Map and normal strength properties.
For the Displacement stuff, you can add a Parallax Occlusion Mapping node and height map texture property to modify the UVs used by the Sample Texture 2D node(s).