Text styling of the navbar

Hey,

I wanted to style the navbar text properties to a lower font size. However this seems to be not possible in the flutterflow settings.

Is there a way that i can achieve this while still having the project inside flutterflow?
The widget used for the navigation is the flutter default "BottomNavigationBar" and it allows for the text to be styled from its documentation: https://api.flutter.dev/flutter/material/BottomNavigationBar/selectedFontSize.html

I can see from the project code i downloaded that the navigation is initialized in the "main.dart" file.