How do I add an ImageView to LaunchScreen.xib in XCode for React Native app?

I am trying to update my SplashScreen on iOS for my React Native app however I cannot find a way to add elements to the View in LaunchScreen.xib within Xcode. I want to add an image to this screen.

All tutorials and blog posts suggest that when the View is selected there should be a toolbar in the bottom right showing similar to this:

My Xcode looks like this with the View selected (no toolbar showing in the bottom right):

Has the method for adding assets/images to the Launch Screen changed or is this toolbar just hidden for some reason? Any advice would be appreciated.