I am playing Unity 2D, I wrote the following code to advance the enemy, but when I play the game the enemy does not advance or even disappears

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

public class Dusman : MonoBehaviour {
    public Transform hedef;
	void Start () {
        hedef = GameObject.FindGameObjectWithTag("Player").transform;
	}
	void FUpdate() {
        
        transform.LookAt(hedef);
        transform.position += transform.forward * 2 * Time.deltaTime;
        
    }
}

Shouldn't that be "FixedUpdate()" instead of "FUpdate()"?

I did that later on Update () but it does not work