I am using AVSpeechSynthesizer to speak some message in SwiftUI. Below is my View:

let speechSynthesizer = AVSpeechSynthesizer()
var body: some View {
        ScrollView{
            VStack {
                displayImage()
                Spacer()
                displayClassifyingOrError()
                if !isClassifying {
                    displayClassifiedItems()
                        .onAppear(){
                            for item in classifier.classifiedItems {
                                let message = "(item.item) should go to (item.bin)"
                                print("Speaking message: (message)")
                                speak(message)
                            }
                                    
                                
                            
                        }
                }
                
                Spacer()
                backButton()
            }
            .onAppear {
                classifyImage()
                checkESP32Connection()
                speak("test message")
            }

            .navigationBarBackButtonHidden(true)
        }
    }

func speak(_ text: String) {
        let utterance = AVSpeechUtterance(string: text)
        utterance.voice = AVSpeechSynthesisVoice(language: "en-US")
        utterance.rate = AVSpeechUtteranceDefaultSpeechRate
        speechSynthesizer.speak(utterance)
    }

The problem is that the app is speaking the “test message” and also it is printing the correct message to be spoken (example: item x should go to y bin), but not speaking the message. I have tries adding delay but then also it is not working. Any idea what is going wrong?