Scene View Cameras overlay shows "No camera found" when Main Camera exists in the scene

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Click the "Cameras" button in the Overlay Menu in the Scene View
3. Observe the Cameras overlay

Actual results: "No camera found" is shown in the Cameras overlay

Expected results: Main Camera is shown in the Cameras overlay

Reproducible with versions: 6000.2.0a10

Not reproducible with versions: 6000.0.48f1, 6000.1.2f1, 6000.2.0a9

Tested on (OS): macOS Silicon Sequoia 15.3