For initializing the project, you'll need to provide the Workspace ID (earlier App ID) of your MoEngage App.

Once you get the AppId, go to your AppDelegate file and call the below initialization method in application:didFinishLaunchingWithOptions: method:

Note: For swift applications add #import <ReactNativeSegmentMoEngage/MoEngageSegmentReactInitializer.h> in App-Bridging-Header.h file. If you have added the react-native-moengage plugin , follow the doc for initialization.

import MoEngageSDK  
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
  
    let sdkConfig = MoEngageSDKConfig(appId: "YOUR APPID", dataCenter: DATA_CENTER);
    sdkConfig.enableLogs = true
    MoEngageSegmentReactInitializer.sharedInstance().initializeDefaultSDKConfig(sdkConfig, andLaunchOptions: launchOptions))
 
    //Rest of the implementation of method
    //-------
    return true
}

#import <ReactNativeSegmentMoEngage/MoEngageSegmentReactInitializer.h>
#import <MoEngageSDK/MoEngageSDK.h>

@implementation AppDelegate

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{    
    MoEngageSDKConfig* sdkConfig = [[MoEngageSDKConfig alloc] initWithAppId:@"YOUR APPID" dataCenter: DATA_CENTER];
    sdkConfig.enableLogs = true;
    [[MoEngageSegmentReactInitializer sharedInstance] initializeDefaultSDKConfig:sdkConfig andLaunchOptions:launchOptions];

    return YES;
}

Following details of the different data centers you need to set based on the dashboard hosts

Refer to the doc to configure the properties of MoEngageSDKConfig.