iOS Launch Options

So this has been something that has been a struggle for a little over a day now.

I'm writing a custom iOS plugin to grab the launch source and then sending it to Unity. This is what I'm attempting to do.

My code below is written in objective-c:

The .mm file

 #import "LaunchNotification.h"
 
 @implementation LaunchNotification
 
 + (void)load
 {
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(createLaunchNotification:) name:UIApplicationDidFinishLaunchingNotification object:nil];
 }
 
 + (void)createLaunchNotification:(NSNotification *)notification
 {
     // This code will be called immediately after application:didFinishLaunchingWithOptions:.
     // You could use this to create an instance of your plugin class, like so:
     
     if(!notification || [notification isKindOfClass:[NSNull class]])
     {
         return;
     }
     
     NSDictionary *launchOptions = [notification userInfo] ;
     NSString *launchSource = [[launchOptions objectForKey:@"UIApplicationLaunchOptionsURLKey"] stringValue];
     UnitySendMessage("GameManager", "LaunchSource", [launchSource UTF8String]);
 }
 
 // Your plugin methods.
 
 @end
 
 // C functions to access your plugin from Unity script.

The .h file

 #import "UnityInterface.h"
 
 @interface LaunchNotification : NSObject
 
 // Class stuff.
 
 @end
 

My problem is lying in that the launch options are nil/null in the received method. I have gone back into the root "didFinishLaunchWithOptions" method and the application and launchOptions are both nil/null. I am unable to figure out why these are null and not getting a reference and have been at this for a while. I am running this project on device through Xcode after building it from Unity.

Any help is very very appreciated, thank you very much!!