The PPv2 convertable elements are not found, unless the scene is opened which contains the PPv2 effects

Steps to reproduce:

1. Download attached project and open in Unity.
2. Open the Render Pipeline Converter >> Window >> Rendering >> Render Pipeline Converter.
3. Select the Target Pipeline to Universal Render Pipeline.
4. Check the Post-Procesing Stack v 2 converter.
5. Press Scan button.

Actual results: No items found to convert. But the PPv2 package is installed, and the effects are used in the scene.

Expected results: PPv2 items should be found when scanning.

Workaround: Open the SampleSample scene. Reset the Render Pipeline Converter Window. Scan the Post-Processing Stack v 2 converter again. 

Reproducible with versions: 

6000.6.0b8, 6000.7.0b1

Not reproducible with versions: 

6000.4.12f1, 6000.5.4f1

Tested on (OS): 

MacBook Pro (16-inch, 2021), CPU: Apple M1 Max, Memory: 64 GB, macOS Tahoe: 26.6.2