Google Admob test Ads not displaying

Questions & Answers
1

**using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using GoogleMobileAds.Api;
using System;

public class AdsManager : MonoBehaviour
{
    private InterstitialAd Interstitial;
    private RewardBasedVideoAd rewardBasedVideo;
  

    // Start is called before the first frame update
    void Start()
    {
        MobileAds.Initialize(initStatus => { });
        this.rewardBasedVideo = RewardBasedVideoAd.Instance;
        // Called when an ad request has successfully loaded.
        rewardBasedVideo.OnAdLoaded += HandleRewardBasedVideoLoaded;
        // Called when an ad request failed to load.
        rewardBasedVideo.OnAdFailedToLoad += HandleRewardBasedVideoFailedToLoad;
        // Called when an ad is shown.
        rewardBasedVideo.OnAdOpening += HandleRewardBasedVideoOpened;
        // Called when the ad starts to play.
        rewardBasedVideo.OnAdStarted += HandleRewardBasedVideoStarted;
        // Called when the user should be rewarded for watching a video.
        rewardBasedVideo.OnAdRewarded += HandleRewardBasedVideoRewarded;
        // Called when the ad is closed.
        rewardBasedVideo.OnAdClosed += HandleRewardBasedVideoClosed;
        // Called when the ad click caused the user to leave the application.
        rewardBasedVideo.OnAdLeavingApplication += HandleRewardBasedVideoLeftApplication;

        this.RequestRewardBasedVideo();
    }

    public void RequestInterstitial()
    {

        string adUnitId = "ca-app-pub-3940256099942544/1033173712";


        // Initialize an InterstitialAd.
        this.Interstitial = new InterstitialAd(adUnitId);

        // Called when an ad request has successfully loaded.
        this.Interstitial.OnAdLoaded += HandleOnAdLoaded;
        // Called when an ad request failed to load.
        this.Interstitial.OnAdFailedToLoad += HandleOnAdFailedToLoad;
        // Called when an ad is shown.
        this.Interstitial.OnAdOpening += HandleOnAdOpened;
        // Called when the ad is closed.
        this.Interstitial.OnAdClosed += HandleOnAdClosed;
        // Called when the ad click caused the user to leave the application.
        this.Interstitial.OnAdLeavingApplication += HandleOnAdLeavingApplication;

        // Create an empty ad request.
        AdRequest request = new AdRequest.Builder().Build();
        // Load the interstitial with the request.
        this.Interstitial.LoadAd(request);
    }
    public void ShowIntl()
    {
        if (this.Interstitial.IsLoaded())
        {
            this.Interstitial.Show();
        }
    }
    public void RequestRewardBasedVideo()
    {

        string adUnitId = "ca-app-pub-3940256099942544/5224354917";

        // Create an empty ad request.
        AdRequest request = new AdRequest.Builder().Build();
        // Load the rewarded video ad with the request.
        this.rewardBasedVideo.LoadAd(request, adUnitId);
    }
    public void HandleOnAdLoaded(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleAdLoaded event received");
    }

    public void HandleOnAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
    {
        MonoBehaviour.print("HandleFailedToReceiveAd event received with message: "
                            + args.Message);
    }

    public void HandleOnAdOpened(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleAdOpened event received");
    }

    public void HandleOnAdClosed(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleAdClosed event received");
    }

    public void HandleOnAdLeavingApplication(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleAdLeavingApplication event received");
    }

    public void HandleRewardBasedVideoLoaded(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardBasedVideoLoaded event received");
    }

    public void HandleRewardBasedVideoFailedToLoad(object sender, AdFailedToLoadEventArgs args)
    {
        MonoBehaviour.print(
            "HandleRewardBasedVideoFailedToLoad event received with message: "
                             + args.Message);
    }

    public void HandleRewardBasedVideoOpened(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardBasedVideoOpened event received");
    }

    public void HandleRewardBasedVideoStarted(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardBasedVideoStarted event received");
    }

    public void HandleRewardBasedVideoClosed(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardBasedVideoClosed event received");
    }

    public void HandleRewardBasedVideoRewarded(object sender, Reward args)
    {
        string type = args.Type;
        double amount = args.Amount;
        MonoBehaviour.print(
            "HandleRewardBasedVideoRewarded event received for "
                        + amount.ToString() + " " + type);
    }

    public void HandleRewardBasedVideoLeftApplication(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardBasedVideoLeftApplication event received");
    }
    public void Showrewarded()
    {
        if (rewardBasedVideo.IsLoaded())
        {
            rewardBasedVideo.Show();
        }
    }
}**

The console shows
Dummy.ShowRewardedAds();
But the ads dont show up.

2

problem fixed here : How to Monetize your game with Admob Ads in Unity | Admob Ads in Unity - YouTube