I can only look up and down not left and right

I followed a yt tutorial trying to make simple fps movement and I cant figure out why I cant look left or right only up and down.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Look : MonoBehaviour
{
public float mouseSpeed = 100f;
public Transform playerBody;
float xRotation = 0f;

void Start()
{
Cursor.lockState = CursorLockMode.Locked;
}
void Update()
{
float mouseX = Input.GetAxis("Mouse X") * mouseSpeed * Time.deltaTime;
float mouseY = Input.GetAxis("Mouse Y") * mouseSpeed * Time.deltaTime;


xRotation -= mouseY;
xRotation = Mathf.Clamp(xRotation, -90f, 90f);

transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);
playerBody.Rotate(Vector3.up * mouseX);
}
}