Admob Rewarded and Interstitial test ad working in Editor but not working in my phone

My admob rewarded and interstitial test ad is working in editor but dont working in my phone.I Think there is no error in the codes, but there may be an error in the build settings. Why do you think this problem is caused?

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using GoogleMobileAds.Api;
 using UnityEngine;
 
 public class Rewarded : MonoBehaviour {
 
     private InterstitialAd interstitial_Ad;
     private RewardedAd rewardedAd;
 
     private string interstitial_Ad_ID;
     private string rewardedAd_ID;
     
     void Update () {
         
         
         
     }    
 
     void Start () {
         interstitial_Ad_ID = "ca-app-pub-3940256099942544/1033173712";
         rewardedAd_ID = "ca-app-pub-3940256099942544/5224354917";
 
         MobileAds.Initialize (initStatus => { });
 
         RequestInterstitial ();
         RequestRewardedVideo ();
 
     }
 
     private void RequestInterstitial () {
         interstitial_Ad = new InterstitialAd (interstitial_Ad_ID);
         interstitial_Ad.OnAdLoaded += HandleOnAdLoaded;
         AdRequest request = new AdRequest.Builder ().Build ();
         interstitial_Ad.LoadAd (request);
     }
 
     private void RequestRewardedVideo () {
         rewardedAd = new RewardedAd (rewardedAd_ID);
         rewardedAd.OnUserEarnedReward += HandleUserEarnedReward;
         rewardedAd.OnAdClosed += HandleRewardedAdClosed;
         rewardedAd.OnAdFailedToShow += HandleRewardedAdFailedToShow;
         AdRequest request = new AdRequest.Builder ().Build ();
         rewardedAd.LoadAd (request);
     }
 
     public void ShowInterstitial () {
         if (interstitial_Ad.IsLoaded ()) {
             interstitial_Ad.Show ();
             RequestInterstitial ();
         }
 
     }
 
     public void ShowRewardedVideo () {
         if (rewardedAd.IsLoaded ()) {
             rewardedAd.Show ();
         }
     }
 
     public void HandleOnAdLoaded (object sender, EventArgs args) {
 
     }
 
     public void HandleRewardedAdFailedToShow (object sender, AdErrorEventArgs args) {
         RequestRewardedVideo ();
     }
 
     public void HandleRewardedAdClosed (object sender, EventArgs args) {
         RequestRewardedVideo ();
     }
 
     public void HandleUserEarnedReward (object sender, Reward args) {
         int coin = 30;
         Coin.toplamCoin += coin;
         PlayerPrefs.SetInt("kaydedilencoin", Coin.toplamCoin);
         Debug.Log(PlayerPrefs.GetInt("kaydedilencoin"));
         
         RequestRewardedVideo ();
     }
 }