i solved this problem by fixing errors appearing in the console.

When i run the app using "run without debug" in vs code the app works correctly but using release mode a white screen apears. In the console i have an error "incorrect parent widget" related to Expanded() that should not be inside a row() or a stack(), after fixing this and compile the app to apk and install it in my phone, no white screen.

So at least fix the errors related to the Widgets building appearing in the console.