so after installing react native using npx react-native init MyProject the project is running and open in emulator but the app file is not app.js instead app.tsx,
The question is i am new to react native and many tutorial i see is havgin App.js file, and the code in app.js is different between js and tsx at least that's what i see, or is it just the same if i follow tutorial like folder structure, syntax and everything.
That's because of this
New projects created by the React Native CLI or popular templates like Ignite will use TypeScript by default.
Read Using JavaScript Instead of TypeScript
You can just rename your tsx to jsx
