Unexpected Token, expected ';' in React Native constructor

When i want to add the constructor in my React Native Project, i always end up with Unexpected token, expected ";" (6:28).

I already tried to add semicolons in every possible location but cannot figure out whats actually the problem, because i am new to TypeScript and React Native.

export default function App() {  constructor(props: Props) {    super(props);    this.state = {      welcomeText: 'Hey this is not working'    };  }  return (<View style={styles.container}><View style={styles.subContainer}></View><View style={styles.subContainer}><Text style={text.header}>Welcome</Text><Text style={text.onBoardingContent}></Text></View></View>  );}...

SyntaxError: /Users/XXXXX/Desktop/XXXXX/Project/XXXXX/App.tsx: Unexpected token, expected ";" (6:28)  4 | export default function App() {  5 |> 6 |   constructor(props: Props) {    |                             ^  7 |     super(props);  8 |  9 |     this.state = {Failed building JavaScript bundle.