iOS Launch screen in React Native

I'm working with a React Native app and I'm trying to set a customize launch screen but I'm not able to.

React Native creates a LaunchScreen.xib by default, so I've created a LaunchImage inside Images.xcassets:

I've also read that I've to modify the "Launch Screen File" under "App Icons and Launch Images" in my options:

Once I've done that, my launch screen became totally black and when the app is loaded, there are both top and bottom black frames:

So I don't know what I have to do to set my launch screen in my React Native project.

I'll be grateful if someone can help me out with those troubles.

Thanks in advance.