FloatingCard. Inspired from this https://x.com/yuki_arano/status/1906563933999337588

View.swift

struct ContentView: View {
    var body: some View {
        FloatingCard {
            VStack {
                Image(systemName: "globe")
                    .imageScale(.large)
                    .foregroundStyle(.tint)
                Text("Hello, world!")
            }
            .padding()
        }
        
    }
}

struct FloatingCard<Content : View>: View {
    var content: () -> Content
    
    var body: some View {
        self.content()
            .padding()
            .background {
                RoundedRectangle(cornerRadius: 10)
                    .fill(Color(UIColor.tertiarySystemGroupedBackground))
                    .shadow(color: .black.opacity(0.1), radius: 4, y: 4)
                    .shadow(color: .black.opacity(0.1), radius: 16, y: 4)

            }
            .overlay {
                LinearGradient(
                    colors:[
                        Color(UIColor.white),
                        Color(UIColor.tertiarySystemGroupedBackground)
                    ],
                    startPoint: .top,
                    endPoint: .bottom
                )
                .mask {
                    RoundedRectangle(cornerRadius: 10)
                        .fill(.clear)
                        .stroke(.black, style: .init(lineWidth: 1))
                }
            }
    }
}

#Preview {
    ContentView()
}