Trying to attach OnPointerEnter script to prefab

This is probably a common problem, but I'm trying to attach a script to a prefab that is instantiated during run time. The script is linked below. Basically, I want the script to enable an inactive game object once the cursor hovers over the newly instantiated prefab. This script works on GameObjects that are already in my hierarchy, but it doesn't seem to work for prefabs.

If anyone has a better idea on how to approach this I would appreciate it.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.EventSystems;
 
 public class TextTest : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
 {
     // Start is called before the first frame update
     public GameObject HoverUI;
     void Start()
     {
         HoverUI.SetActive(false);
     }
 
     public void OnPointerEnter(PointerEventData eventData)
     {
         HoverUI.SetActive(true);
         Debug.Log("Test");
 
     }
 
     public void OnPointerExit(PointerEventData eventData)
     {
         HoverUI.SetActive(false);
     }
 }