variables do not save between scripts

 using UnityEngine;
 using UnityEngine.UI;
 
 public class MainButton : MonoBehaviour
 {
     public Text AmountDisplay;
     public int ClickAmount;
 
     public void Update()
     {   
         AmountDisplay.text = ClickAmount + "";
     }
 
     public void ClickTheButton(int multiplier) {
         Debug.Log(multiplier);
         ClickAmount = ClickAmount + multiplier;
     }
 } 

This is my Main script i want to save variables form his script to my next script

 using UnityEngine;
 using UnityEngine.UI;
 
 public class Multipliers : MonoBehaviour
 {
     public int multiplier = 1;
     private bool Enable = true;
 
     public GameObject errorMoney;
     public GameObject errorEnable;
 
     public void ButtonX2Multiplier(int ClickAmount)
     {
         Debug.Log(ClickAmount);
         if (ClickAmount >= 20 && Enable == true)
         {
             Enable = false;
             ClickAmount = ClickAmount - 20;
             multiplier = 2;
         }
 
         if(Enable == false)
         {
             errorMoney.SetActive(true);
         }
 
         if(ClickAmount < 20)
         {
             errorEnable.SetActive(false);
         }
 
     }
 
 }

Can someone help my?