Show/Hide Password – How can I add this feature?

You can simply use this view instead of SecureField. It has the eye icon inside, so for most cases you don’t need to care about anything.

struct SecureInputView: View {
    
    @Binding private var text: String
    @State private var isSecured: Bool = true
    private var title: String
    
    init(_ title: String, text: Binding<String>) {
        self.title = title
        self._text = text
    }
    
    var body: some View {
        ZStack(alignment: .trailing) {
            Group {
                if isSecured {
                    SecureField(title, text: $text)
                } else {
                    TextField(title, text: $text)
                }
            }.padding(.trailing, 32)

            Button(action: {
                isSecured.toggle()
            }) {
                Image(systemName: self.isSecured ? "eye.slash" : "eye")
                    .accentColor(.gray)
            }
        }
    }
}

Copy paste this view into your app, and instead of SecureField just use SecureInputView.

Example: SecureInputView("Password", text: $viewModel.password)