Need some help with controlling audio with ui slider .

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.Audio;
 using TMPro;
 
 public class GameStatus : MonoBehaviour
 {
     [SerializeField] public TextMeshProUGUI ScoreDisplay;
     [SerializeField] public TextMeshProUGUI WaveDisplay;
     [SerializeField] [Range(0, 1)] public float deathVolume;
     [SerializeField] AudioClip playerFireSound;    ///Fire Sound
     [SerializeField] public Slider Soundslider;      /// Slider to control the sound
     public GameObject PauseMenuPanel;
     public EnemySpawner enemySpawner;
     public AudioMixer audioMixerMusic;
     int score;
     public static int highScore;
     public static bool GameIsPaused = false;
     
     void Start()
     {
         enemySpawner = FindObjectOfType<EnemySpawner>();
     }
 
     public void SetMusicLevel(float music)
     {
         audioMixerMusic.SetFloat("MusicVolume", music);
     }
 
     public void SetSoundLevel(float deathVolume)
     {
         Soundslider.value = deathVolume;           // slider takes float value but the sound remains unchanged..HELP!!
     }
 
     void Update()
     {
         ScoreDisplay.text = GetScore().ToString();
         highScore         = int.Parse(ScoreDisplay.text);
         PlayerPrefs.SetInt("NewScore", highScore);
         WaveDisplay.text  = enemySpawner.WaveCount.ToString();
         if(Input.GetKeyDown(KeyCode.Escape))
         {
             if(GameIsPaused)
             {
                 Resume();
             }
             else
             {
                 Pause();
             }
         }
     }
 
     public void FireSound()
     {
         if (GameObject.Find("Player") != null)
         {
             AudioSource.PlayClipAtPoint(playerFireSound, Camera.main.transform.position, deathVolume);
         }
     }

I've commented out the part which i'm troubled with. Here this GameStatus script is referenced with slider OnValueChanged event where it takes the float value from deathSound . but when the slider is changed during play mode the value doesn't get updated. Whereas when i change it from the inspector in this script it does changes. What am i missing here, please can someone help me out with it..:)