The Inspector of a Shader Asset does not show the correct number of vertex and fragment shader variants when using "multi_compile_fragment" directive

How to reproduce:
1. Open the “MultiCompileFragmentVariants” project
2. Select the “UnlitMultiCompileFragmentMultiLines” shader in Project
3. In the Inspector select “Compile and show code” then observe the lines of code
4. Select the arrow next to the “Compile and show code” button
5. Observe the Inspector

Expected result: The Inspector shows that it generates more than one vertex shader variant and more than one fragment shader variant
Actual result: The Inspector does not show that it generates more than one vertex shader variant and more than one fragment shader variant

Reproduced with: 2021.3.32f1, 2022.3.13f1, 2023.1.20f1, 2023.2.0f1, 2023.3.0a14

Reproduced on: Windows 10 (by reporter), Windows 11
Not reproducible on: No other environment tested