Steps to reproduce:

1. Create a new Unity project using the High Definition 3D template
2. Select any GameObject
3. Add the Custom Pass Volume component in the Inspector window
4. Click the "+" button in the Custom Passes list
5. Select Draw Renderers Custom Pass
6. Click on the Draw Renderers Custom Pass title to open/close it
7. Observe the Custom Passes list

Actual results: The Draw Renderers Custom Pass opens and closes when clicked like a foldout but does not have a foldout triangle icon to indicate to the user that it can be opened or clicked

Expected results: The Custom Passes have a foldout triangle icon indicating to the user that it can be opened or closed

Reproducible with versions: 6000.0.70f1, 6000.3.11f1, 6000.4.0f1, 6000.5.0a9

Tested on (OS): MacOS SIlicon Tahoe 26.2