Steps to reproduce:
1. Open the attached “IN-92263.zip” project
2. Open the “SampleScene”
3. In the Project Hierarchy select the “Terrain” GameObject and open it in the Inspector Window
4. Find the “Terrain” Component
5. Open the “Terrain Settings” tool
6. Change any attribute
7. Observe the results on the changed attribute

Expected result: The attribute name is turned to bold and pressing “Right-Click” opens a “Prefab Override” context menu
Actual result: The attribute stays the same as it would on a non-prefab object and “Right-Click” does not open the “Prefab Override” context menu

Reproducible in: 2021.3.47f1, 2022.3.55f1, 6000.0.33f1, 6000.1.0b2

Reproducible on: Windows 11, macOS (Silicon)
Not reproducible on: No other environment tested