I remember that I’ve read somewhere that Thunkable will publish the app to both Playstore & AppStore when I selected Thunkable for develop my app. But I don’t see any way as that. How can I publish my app using Thunkable’s Play store developer account and App store developer account?
Google publishing Thunkable and read the Publishing Overview. At the bottom of that web page are links to detailed instructions for publishing to each app store.