The calendar widget and buttons shows a lightened / material background behind some content when the widget is in clear / tinted mode (example here: https://developer.apple.com/videos/play/wwdc2025/278?time=72). How can this be done? I tried applying a material and glass background to a view using the .background(...) modifier, but the background is made white. Text("Hello") .padding() .background { ContainerRelativeShape() .fill(.thinMaterial) } Text("Hello") .padding() .background { ContainerRelativeShape() .glassEffect() } Is this not supported, a bug, or am I doing something wrong?