Make broadcast picker required in iOS only

react/Header.js

@@ -0,0 +1,24 @@
+import React from 'react';
+import SystemBroadcastPicker from './ios/native-components/BBBN_SystemBroadcastPicker';
+import {Platform, StyleSheet} from 'react-native';
+
+const styles = StyleSheet.create({
+  broacastPicker: {
+    ...Platform.select({
+      ios: {
+        marginTop: 50,
+        height: 50,
+        widht: 50,
+        backgroundColor: '#EEE',
+      },
+    }),
+  },
+});
+
+const Header = ({children, title}): Node => {
+  return Platform.select({
+    ios: <SystemBroadcastPicker style={styles.broacastPicker} />,
+  });
+};
+
+export default Header;