Walljump 2D doesn't work why ?

 using UnityEngine;
 
 public class PlayerMovement : MonoBehaviour
 {
     private Rigidbody2D body;
     [SerializeField] private float speed;
     [SerializeField] private float jumpPower;
     [SerializeField]private LayerMask groundLayer;
     private Animator anim;
     [SerializeField] private LayerMask wallLayer;
 
     private BoxCollider2D boxCollider;
     private float wallJumpCooldown;
     private float horizontalInput;
     
 
 
     private void Awake()
     {
         body = GetComponent<Rigidbody2D>();
         anim = GetComponent<Animator>();
         boxCollider = GetComponent<BoxCollider2D>();
         
 
 
     }
 
     private void Update()
     {
         horizontalInput = Input.GetAxis("Horizontal");
         
 
         //Flip character when facing left, right
         if (horizontalInput > 0.01f)
         {
             transform.localScale = new Vector3((float)1.4, (float)1.4, (float)1.4);
         }else if (horizontalInput < -0.01f)
         {
 
             transform.localScale = new Vector3((float)-1.4, (float)1.4, (float)1.4);
         }
         if (wallJumpCooldown > 0.2f)
         {
             
             body.velocity = new Vector2(horizontalInput * speed, body.velocity.y);
 
             if (onWall() && !isGrounded())
             {
                 body.gravityScale = 0;
 
                 body.velocity = Vector2.zero;
             }
             else
                 body.gravityScale = 1.5f;
 
             if (Input.GetKey(KeyCode.Space))
                 Jumps();
         }
         else
             wallJumpCooldown += Time.deltaTime;
 
         anim.SetBool("run", horizontalInput != 0);
         anim.SetBool("grounded", isGrounded());
        
 
     
     }
 
     private void Jumps()
     {
         if (isGrounded())
         {
 
             body.velocity = new Vector2(body.velocity.x, jumpPower);
             anim.SetTrigger("jump");
         }
         else if (onWall() && isGrounded())
         {
             if(horizontalInput == 0)
             {
                 body.velocity = new Vector2(-Mathf.Sign(transform.localScale.x) * 10, 0);
                 transform.localScale = new Vector3(-Mathf.Sign(transform.localScale.x), transform.localScale.y, transform.localScale.z);
             }
             else
                 body.velocity = new Vector2(-Mathf.Sign(transform.localScale.x) * 3, 6);
 
             wallJumpCooldown = 0;
             
         }
     }
 
     private void OnCollisionEnter2D(Collision2D collision)
     {
         
     }
     
 
     private bool isGrounded()
     {
         RaycastHit2D raycastHit = Physics2D.BoxCast(boxCollider.bounds.center, boxCollider.bounds.size, 0, Vector2.down, 0.1f, groundLayer);
         return raycastHit.collider != null;
     }
 
 
     private bool onWall()
     {
         RaycastHit2D raycastHit = Physics2D.BoxCast(boxCollider.bounds.center, boxCollider.bounds.size, 0,new Vector2(transform.localScale.x, 0), 0.1f, wallLayer);
         return raycastHit.collider != null;
     }
 }