Jitsi meet react native

Hello, Im trying to use jitsi meet for video conferencing in react-native, but Im confused how can I add customization to the https://github.com/jitsi/jitsi-meet repository. If the repository cant be change and native sdk is the only solution how must I use it as I have no idea abour iOS and Android…

In short I want to add splash screen to https://github.com/jitsi/jitsi-meet can someone help