How should I see the compiled shader on iphone?

Hi, All.
I want to see the shader assembly that was compiled for iphone.
When I select built-in shader and click on ‘Open compiled shader’, it shows assembly, correctly.
But, if my custom shader was selected, It just shows ShaderLab script.
How should I see the compiled shader?
Thanks in advance.

Shaders get compiled on the iOS device, not in Unity.