Do I need to create a new storyboard for iOS app?

I’m about to build iOS app. There are a few things I’m confused when setting it.
According to this Defold development for the iOS platform, it seems that I will need a storyboard, but in game.project I see that the value is already set to /builtins/manifests/ios/LaunchScreen.storyboardc. (My project is using Mobile game template).
Will I need a new storyboard or can use the built-in one?

Also there is /assets/ at Icons Asset field. Do I need to replace this file?

My app supports 2 languages English & Vietnamese. So at Default Language I will set to “en,vi”, the same value for Localizations?

Thanks for your help!