Calling a function in a prefab from a function of another GameObject in C#,Calling a function in a prefab from a function in another GameObject in C#

Hi, I'm a Unity beginner and even though I found several similar questions to mine, none of the answers really helped so I'm asking my specific question:

• I have a button that instatiates (as child) a prefab GameObject with a script attached.

• I have another button (also child of the first button) that is then supposed to call a function from that prefab's script.

Here is the code that's on the child button:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class externactive : MonoBehaviour
 {
     public GameObject button;
     public GameObject thing;
     public move myScript;
 
     public void Find ()
     {
         thing = button.transform.Find("Mixfigur(Clone)").gameObject;
         myScript = thing.GetComponent<move>();
         myScript.Activate();
     }
 }

The parent button is drag&dropped into the "button" slot in Unity interface. The prefab's script is called "move" and it has a function "Activate ()". Upon running this, the "thing" slot gets filled with the prefab correctly, but running its function does not work.

I tried the exact same code with a non-prefab game object and it works. The problem seems to be directly tied to it being a prefab. Here is the code for that second example, again on the button that wants to call a function (this time on a non-prefab GameObject):

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class zwei : MonoBehaviour {
 
     public GameObject target;
     public ballscript ballFull;
 
     public void Kicking ()
     {
         target = transform.Find("Ball").gameObject;
         ballFull = target.GetComponent<ballscript>();
         ballFull.Kick();
     }
 }

The "Ball" is a child of the button to make sure the same Find operation as in the first script has to find it during runtime. This code works just fine. I cannot see a difference. Does the problem have something to do with prefabs just being handled differently?