When the UseMaterial3 MSBuild property is enabled, the SearchBar control should adopt the Material 3 visual design system. However, the current implementation does not fully reflect Material 3 behavior.
The SearchBar should use Material 3–specific styling, including updated container styling, text field appearance, icon colors, typography, shape, and state behaviors (focused, unfocused, disabled, error, etc.). It should also rely on the appropriate Material 3 components and resources when this property is enabled.