Random launch-image for iOS and Android - android

I am currently working on a react native project. One of the requirement is to show random launch images on startup on both Android and iOS.
Do you guys know how can this be achieved ? I saw the solution ( Random Image for Launch Screen ) , however, I am not that good in iOS/Android.
Can you please guide me into achieving this ? Is there a better solution in react-native itself ?
Thanks and Kind Regards,
Avinash

I am going to use a temporary screen to show the splashscreen on react-native side.
On native side, I will be using a image icon.
so that when the app launches, you will see the icon followed by the temp screen followed by your Home screen.

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What you see upon launch is called Launch Screen or Splash Screen.
The default configuration allows you to showcase a static image upon launch, you may update the images for iOS at App_Resources/iOS/Assets.xcassets Or Android at App_Resources/Android/src/main/res/drawable-***/background.png
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P.S. Thank you for useless downvoting

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