Steps to reproduce:

1. Open the attached project
2. Open the TestScene
3. Observe that the Scene contains a Cube prefab
4. In the Hierarchy's Search window, add a new query block Components -> Prefabs
5. Observe the Hierarchy results

Actual results: No objects are returned

Expected results: Cube object is returned

Reproducible with versions: 6000.3.0a2, 6000.3.0b3, 6000.4.0a1

Can’t test with versions: 6000.0.56f1, 6000.1.16f1, 6000.2.1f1, 6000.3.0a1 (Hierarchy V2 not available)

Tested on (OS): macOS 15.6.1

Notes:

• If the 'Open query in Search Window' button is used after adding the Prefab query, the opened search window will display the correct result
• Picking the Search query block from the Prefabs section instead of the Components section (e.g. - Prefabs -> Any) will return the correct result

Notes:

• Legacy hierarchy doesn't support t:prefab.
• Search Window supports t:prefab in hierarchy because we have a specific Managed filter.

** We should try to make the C++ type filtering code work with prefab