Cant jump while sprinting (RigidBody Movement)

Hi! I use rigidBody movement but I can't figure out why I can't jump while sprinting

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerMovement : MonoBehaviour
 {
     [Header("Movement")]
     int iSprint = 0;
     public float moveSpeed;
     public float sprintSpeed;
 
 
     public float groundDrag;
 
     public float jumpForce;
     public float jumpCooldown;
     public float airMultiplier;
     bool readyToJump;
 
     [Header("KeyBinds")]
     public KeyCode jumpKey = KeyCode.Space;
     public KeyCode sprintKey = KeyCode.LeftShift;
 
 
     [Header("Ground Check")]
     public float playerHeight;
     public LayerMask WhatisGround;
     public bool grounded;
 
     public Transform orientation;
 
     float horizontalInput;
     float verticalInput;
 
     Vector3 moveDirection;
 
     Rigidbody rb;
     public Transform Tay;
     public Camera myCamera;
 
     private void Start()
     {
         rb = GetComponent<Rigidbody>();
         rb.freezeRotation = true;
         ResetJump();
     }
     void Update()
     {
         Vector3 ray = Tay.TransformDirection(Vector3.down) * playerHeight * 0.5f;
         grounded = Physics.Raycast(Tay.position, Vector3.down, playerHeight * 0.5f + 0.1f, WhatisGround);
         Debug.DrawRay(Tay.position, ray, Color.cyan);
         Sprint();
         MyInput();
         SpeedControl();
         if (grounded)
             rb.drag = groundDrag;
         else
             rb.drag = 0;
     }
     private void FixedUpdate()
     {
         MovePlayer();
     }
     private void MyInput()
     {
         horizontalInput = Input.GetAxisRaw("Horizontal");
         verticalInput = Input.GetAxisRaw("Vertical");
         if (Input.GetKey(jumpKey) && readyToJump && grounded)
         {
             readyToJump = false;
             Jump();
             Invoke(nameof(ResetJump), jumpCooldown);
         }
     }
     private void MovePlayer()
     {
         moveDirection = orientation.forward * verticalInput + orientation.right * horizontalInput;
         if (grounded)
             rb.AddForce(moveDirection.normalized * moveSpeed * 10f, ForceMode.Force);
         else if (!grounded)
             rb.AddForce(moveDirection.normalized * moveSpeed * 10f * airMultiplier, ForceMode.Force);
     }
     private void SpeedControl()
     {
         Vector3 flatVel = new Vector3(rb.velocity.x, 0f, rb.velocity.z);
         if (flatVel.magnitude > moveSpeed)
         {
             Vector3 limitedVel = flatVel.normalized * moveSpeed;
             rb.velocity = new Vector3(limitedVel.x, rb.velocity.y, limitedVel.z);
         }
     }
     private void Jump()
     {
         rb.velocity = new Vector3(rb.velocity.x, 0f, rb.velocity.z);
         rb.AddForce(transform.up * jumpForce, ForceMode.Impulse);
     }
     private void ResetJump()
     {
         readyToJump = true;
     }
     IEnumerator FovPlus()
     {
         for (int i = 0; i < 3; i++)
         {
             myCamera.fieldOfView = myCamera.fieldOfView + 5;
             yield return new WaitForSeconds(0.02f);
         }
 
     }
     IEnumerator FovMinus()
     {
         for (int i = 0; i < 3; i++)
         {
             myCamera.fieldOfView = myCamera.fieldOfView - 5;
             yield return new WaitForSeconds(0.02f);
         }
     }
     private void Sprint()
     {
         if (Input.GetKey(jumpKey) && readyToJump && grounded)
         {
             readyToJump = false;
             Jump();
             Invoke(nameof(ResetJump), jumpCooldown);
         }
         if (Input.GetKey(sprintKey))
         {
             moveSpeed = sprintSpeed;            
             if (iSprint == 0)
             {
                 Debug.Log("fov +");
                 iSprint++;
                 StartCoroutine(FovPlus());
             }
         }
         else
         {
             moveSpeed = 2.5f;
             if (iSprint == 1)
             {
                 Debug.Log("fov -");
                 iSprint--;
                 StartCoroutine(FovMinus());
             }
         }
     }
 }