How to reproduce:
1. Open the attached project "ForUpgrade"
2. Go to Window -> Rendering -> Render Pipeline Converter
3. Select the "Rendering Settings" converter and click "Scan"
4. Click the checkbox next to the "Graphics" or "Quality" category header
5. Observe the results
Expected results: The category checkbox is either disabled to match its non-interactive leaf items, or clicking it produces a visible change
Actual results: The "Graphics" and "Quality" category checkboxes appear enabled and clickable but clicking them has no effect, while the leaf item checkboxes ("Default Render Pipeline", "High") are correctly grayed out and disabled
Reproducible with: 6000.5.9f1, 6000.6.0b9, 6000.7.0a5
Can't test with: 6000.0.81f1, 6000.3.17f1 (Different design)
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested