Sheet view issues

import SwiftUI

struct ContentView: View {
    @State var sheetIsPresented: Bool = false
    @State var count: Int = 0

    @State var color: Color = .white

    var body: some View {
        ZStack {
            color
                .ignoresSafeArea()
            VStack {
                HStack {
                    Text(String(count))
                    Button("Count +1") {
                        count += 1
                    }
                }
                Button("Show sheet") {
                    sheetIsPresented = true
                }
            }
            .padding()
            .background(Color(.white).shadow(radius: 2))

        }
        .sheet(isPresented: $sheetIsPresented, onDismiss: {
            color = .random
        }) {
            VStack {
                Button("isPresented = false") {
                    sheetIsPresented = false
                }
                SheetView()
                    .presentationDetents([.fraction(0.49)])
                    .presentationBackgroundInteraction(.enabled)
                    .presentationDragIndicator(.visible)
                Spacer()
            }
            .padding(.top, 25)
        }
    }
}

struct SheetView: View {
    @Environment(\.dismiss) var dismiss
    var body: some View {
        Button("Dismiss via dismiss()") {
            dismiss()
        }
    }
}

/// Extension to generate random colors
extension Color {
    static var random: Color {
        return Color(hue: Double.random(in: 0...1), saturation: Double.random(in: 0...1), brightness: Double.random(in: 0...1))
    }
}

#Preview {
    ContentView()
}