Dynamic Flutter Developer for Firebase App

I want build app
Using flutter language
Firebase database
Copy for android google app
Copy for apple iPhone app

Main condition

Ensuring that the application is uploaded and that it works on Google and iPhone stores

Pleas follow next YouTube link and back to me

https://youtu.be/jfGJUZxU4IU?si=HYc6o2gOkZ8mrRbR