Update googleads 9.1.0 iOS GADMediationAdapterFacebook not ready.

[REQUIRED] Step 1: Describe your environment

Unity version: 2022.3.27f1
Google Mobile Ads Unity plugin version: 9.1.0
Plugin installation method: unitypackage
Platform: iOS (iOS, Android, Unity Editor)
Platform OS version: 17
Any specific devices issue occurs on: _____
Mediation ad networks used, and their versions: _____

[REQUIRED] Step 2: Describe the problem

Steps to reproduce:

What happened? How can we make the problem occur?

Update to: AdMob SDK 9.1.0 Mediation: GoogleMobileAdsMediationFacebook 6.15.0

Encountering the issue "Adapter: GADMediationAdapterFacebook not ready." on iOS. Could you please assist in resolving this?

in debugging message Failed: Adapter failed to initialize. Adapter raised an exception during setup. Adapter: GADMediationAdapterFacebook, Exception: FBAdInitSettings is a final class and cannot be subclassed. FBAdInitSettings

Please share a downloadable sample project that reproduces the bug, if available. This greatly helps us to diagnose and fix the issue faster.

Relevant Code:

// TODO(you): code here to reproduce the problem
public void MobileAdsInit()
{
    MobileAds.Initialize((initStatus) =>
            {
                Dictionary<string, AdapterStatus> map = initStatus.getAdapterStatusMap();
                foreach (KeyValuePair<string, AdapterStatus> keyValuePair in map)
                {
                    string className = keyValuePair.Key;
                    AdapterStatus status = keyValuePair.Value;
                    switch (status.InitializationState)
                    {
                        case AdapterState.NotReady:
                            {
                                // The adapter initialization did not complete.
                                Debug.LogErrorFormat("[Log] AdMobProxy Adapter: {0} not ready.", className);

                            }
                            break;
                        case AdapterState.Ready:
                            {
                                // The adapter was successfully initialized.
                                Debug.LogFormat("[Log] AdMobProxy Adapter: {0} is initialized.", className);
                            }
                            break;
                        default:
                            break;
                    }
                }

            });
}

googleads / googleads-mobile-unity