How to force disable iOS dark mode in React Native

In your app.json file add:

{
  "expo": {
     ...
     "ios": {
      "infoPlist": {
        "UIUserInterfaceStyle": "Light"
      }
    },
}

The solution is to either

1. add this to your Info.plist file:

    <key>UIUserInterfaceStyle</key>
    <string>Light</string>

OR

2. Add this to your AppDelegate.m:

    if (@available(iOS 13.0, *)) {
        rootView.overrideUserInterfaceStyle = UIUserInterfaceStyleLight;
    }