Xamarin.iOS Native Ads Admob - Adloader.Delegate NULL

Question

I am trying to implement native ads in my Xamarin.ios application. My Adloader.delegate is always null and I cannot figure out how to solve this.

The application output says "Delegate does not conform to the required protocol, GADNativeAdLoaderDelegate".

The nuget package that I am using is: Xamarin.Google.ios.MobileAds

This is my code:

public ExploreController (IntPtr handle) : base (handle)
{
    adLoader = new AdLoader(
        "ca-app-pub-3940256099942544/3986624511",
        this,
        new AdLoaderAdType[] { AdLoaderAdType.Native },
        new AdLoaderOptions[] { new AdLoaderOptions() })
        { Delegate = new MyAdLoaderDelegate() };

    adLoader.LoadRequest(Request.GetDefaultRequest());
    
}



 public class MyAdLoaderDelegate : NSObject, IUnifiedNativeAdLoaderDelegate
 {

   public MyAdLoaderDelegate()
   {
   }

   public void DidReceiveUnifiedNativeAd(AdLoader adLoader, NativeAd nativeAd)
   {
       Debug.WriteLine("DidReceiveUnifiedNativeAd");
   }
   public void DidFailToReceiveAd(AdLoader adLoader, NSError error)
   {
      Debug.WriteLine("DidFailToReceiveAd");
      //base.DidFailToReceiveAd(adLoader, error);
   }

   public void DidFinishLoading(AdLoader adLoader)
   {
      Debug.WriteLine("DidFinishLoading");
      //base.DidFinishLoading(adLoader);
   }
}

UPDATE:

I changed IUnifiedNativeAdLoaderDelegate to UnifiedNativeAdLoaderDelegate and tried to override the methods, but stil same result:

public class MyAdLoaderDelegate : UnifiedNativeAdLoaderDelegate
{

    public override void DidFailToReceiveAd(AdLoader adLoader, NSError error)
    {
        base.DidFailToReceiveAd(adLoader, error);
    }

    public override void DidFinishLoading(AdLoader adLoader)
    {
        base.DidFinishLoading(adLoader);
    }

    public override void DidReceiveUnifiedNativeAd(AdLoader adLoader, NativeAd nativeAd)
    {
        throw new NotImplementedException();
    }
}