Floating Action Button

Just copy the below code and modify according to your needs.

var body: some View {
    VStack(spacing: 20) {
        // ...
    }
    .frame(maxWidth: .infinity, maxHeight: .infinity)
    .overlay(
        VStack {
            Spacer() // Pushes the button to the bottom
            HStack {
                Spacer() // Pushes the button to the right
                Button(action: {
                    // Button Action here
                }) {
                    Image(systemName: "plus")
                        .foregroundColor(.white)
                        .padding()
                        .background(Color(.green))
                        .clipShape(Circle())
                        .shadow(color: Color(.gray), radius: 2.5)
                }
                .padding()
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
    )
}