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Player 3D Movement With Camera Movement in Unity

I will explain how you can make a 3D Player movement in Unity

Make a New Input Action

I Setup my Character like this here i added camera if you want to remove then you can

CheckGround : I added a CheckGround Empty Object for checking character is touching ground or not.

📁PlayerMovement.cs

using System.Transactions;
using UnityEngine;
using UnityEngine.InputSystem;


[RequireComponent(typeof(CharacterController))]
public class PlayerController : MonoBehaviour
{
    [SerializeField]
    private InputActionReference movementControl;
    [SerializeField]
    private InputActionReference jumpControl;
    private CharacterController controller;
    private Vector3 playerVelocity;
    private bool groundedPlayer;
    [SerializeField]
    private float playerSpeed = 2.0f;
    [SerializeField]
    private float jumpHeight = 1.0f;
    [SerializeField]
    private float gravityValue = -9.81f;
    private Transform cameraMainTransform;
    private float rotationSpeed = 4.0f;

    private void OnEnable()
    {
        movementControl.action.Enable();
        jumpControl.action.Enable();
    }
    private void OnDisable()
    {
        movementControl?.action.Disable();
        jumpControl?.action?.Disable(); 
    }

    private void Start()
    {
        controller = gameObject.GetComponent<CharacterController>();
        cameraMainTransform = Camera.main.transform;
        Cursor.lockState = CursorLockMode.Locked;
    }

    void Update()
    {
        groundedPlayer = controller.isGrounded;
        if (groundedPlayer && playerVelocity.y < 0)
        {
            playerVelocity.y = 0f;
        }
        Vector2 movement = movementControl.action.ReadValue<Vector2>();
        Vector3 move = new Vector3(movement.x, 0, movement.y);
        move = cameraMainTransform.forward * move.z + cameraMainTransform.right * move.x;
        move.y = 0;
        controller.Move(move * Time.deltaTime * playerSpeed);

    
        // Changes the height position of the player..
        if (jumpControl.action.triggered && groundedPlayer)
        {
            playerVelocity.y += Mathf.Sqrt(jumpHeight * -3.0f * gravityValue);
        }

        playerVelocity.y += gravityValue * Time.deltaTime;
        controller.Move(playerVelocity * Time.deltaTime);

        if(movement!=Vector2.zero)
        {
            float targetAngle = Mathf.Atan2(movement.x,movement.y) * Mathf.Rad2Deg + cameraMainTransform.eulerAngles.y;
            Quaternion rotation = Quaternion.Euler(0f,targetAngle,0f);
            transform.rotation = Quaternion.Lerp(transform.rotation, rotation, Time.deltaTime*rotationSpeed);
        }
    }
}