How to use one binary array in multiple unity scripts?

Question

Unity

I wrote the code, 64 objects are created, I save them in one binary array

[SerializeField] public GameObject[,] plitkmac = new GameObject [8, 8];
.
.
plitkmac[y,x]=inst;

They are all saved and I can use the array in one script. But I need to use ego in other scripts as well.
Tried this way:

GameObject[,] plitkmac = transform.GetComponent<creature>().plitkmac;
 print(plitkmac[1,1].name);

But unity throws an error and visual studio doesn't.

NullReferenceException: Object reference not set to an instance of an object
panel.cretecreateChecker () (at Assets/Board/scripts/panel.cs:15)
panel.Start () (at Assets/Board/scripts/panel.cs:10)

all code

using System;
using UnityEngine;
using UnityEngine.UI;

 public class creature : MonoBehaviour
{
    public GameObject instpref;
    
   [SerializeField] public GameObject[,] plitkmac = new GameObject[8, 8];

    void Start()
    {
        int plas = 0;


        for (int y=0; y< 8; y++ )
        {
            int gpy = -315 + y * 90;
            for (int x=0; x<8; x++)
            {
                int gpx = -315 + x * 90;
                GameObject inst = Instantiate(instpref, transform);
                int collor = ((8 * y + x+plas)%2);
                if (collor == 1)
                {
                    inst.GetComponent<Image>().color = Color.white;
                }
                inst.GetComponent<RectTransform>().anchoredPosition =new Vector2(gpx, gpy);
                plitkmac[y  ,x] = inst;
                inst.name = "panel" + y + x;
                
            }
           plas++;
        }
    }
  

}

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

public class panel : MonoBehaviour
{
  
    void Start()
    {
        cretecreateСhecker();
    }
    public void cretecreateСhecker()
    {
        GameObject[,] plitkmac = transform.GetComponent<creature>().plitkmac;
        print(plitkmac[1,1].name);
    }

and another question, is it possible to make a binary array visible in the inspector, and if so, how?