How to reproduce:
1. Create a new Unity project and install the Multiplayer Services package
2. In the Project window, right-click -> Create -> Services -> Deployment Definition
3. Observe the results
Expected results: The Asset uses a custom icon
Actual results: The Asset has no custom icon and uses the default icon
Reproducible with: 1.7.2 (6000.4.12f1, 6000.5.0b11, 6000.6.0a7)
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested