Trouble implementing UnityAds alongside SFML

I am currently trying to implement UnityAds to work alongside another Framework I am using for my game. The Framework is open-source and has a license that allows for modifications. These are some snippets from the code, where I have attempted to integrate UnityAds. I followed the tutorial for iOS intergration and the debug console appears to be outputting information indicating that an ad should appear; however, nothing appears. Here are the previously mentioned snippets, they are titled accordingly:

didFinishLaunchingWithOptions initialization:

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
     //SFML Code....
 
     [[UnityAds sharedInstance] setTestMode:YES];
     [[UnityAds sharedInstance] setDebugMode:YES];
     [[UnityAds sharedInstance] startWithGameId:@"********"];
     
     //This code is meant to set the unity delegate, however, I'm not sure it is working correctly. I get no errors.
     NSObject *delegate = [SFAppDelegate getInstance];
     [[UnityAds sharedInstance] setDelegate:delegate];
 
     // More SFML Stuff...
     return true;
 }

ViewDidAppear code, I could not set the viewController during initialization, so it is done here:

 - (void) viewDidAppear:(BOOL)animated
 {
     [super viewDidAppear:animated];
     [[UnityAds sharedInstance] setViewController:self];
 }

As previously stated, the log outputs information describing a successful attempt to display an add; however nothing appears on screen. I get no errors, simply nothing appears. I can dump the output if requested.

The follow code is a method I wrote inside SFML's window implementation, it simply displays the ad. This should be irrelevant, but here it is in the case someone asks where I show an add:

 bool WindowImplUIKit::displayAd()
 {
     [[UnityAds sharedInstance] setZone:@"rewardedVideoZone"];
     
     if ([[UnityAds sharedInstance] canShow] && [[UnityAds sharedInstance] canShowAds])
         [[UnityAds sharedInstance] show];
     
     if (adHandler.didFinishAd == true)
     {
         adHandler.didFinishAd = false;
         return true;
     }
     else
         return false;
 }

Finally, I have only implemented the one method required by UnityAds:

 - (void)unityAdsVideoCompleted:(NSString *)rewardItemKey skipped:(BOOL)skipped
 {
     NSLog(@"unityAdsVideoCompleted:rewardItemKey:skipped: -- key: %@", rewardItemKey);
     sfWindow->setAdFinished(true);
 }

Where setAdFinished(true); changes adHandler.didFinishAd