ARアプリにセーブ機能を付ける方法

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

[System.Serializable]
public class ObjectData
{
    public string objectName;
    public Vector3 position;
    public Quaternion rotation;
    
}

[System.Serializable]
public class GameData
{
    public List<ObjectData> objects = new List<ObjectData>();
}
public class SaveLoadManager : MonoBehaviour
{
    private string filePath;
    public string objectTag = "d_obj"; // オブジェクトに付けられたタグ  

    private void Start()
    {
        filePath = Path.Combine(Application.persistentDataPath, "gameData.json");
    }

    public void SaveGame()
    {
        GameData gameData = new GameData();
        GameObject[] gameObjects = GameObject.FindGameObjectsWithTag(objectTag); // タグを持つオブジェクトを取得  

        foreach (GameObject obj in gameObjects)
        {
            ObjectData data = new ObjectData
            {
                objectName = obj.name,
                position = obj.transform.position,
                rotation = obj.transform.rotation,
               
            };
            gameData.objects.Add(data);
            Debug.Log(obj.name);
            Debug.Log(obj.transform.position);
        }

        string json = JsonUtility.ToJson(gameData, true);
        File.WriteAllText(filePath, json);
        Debug.Log("Game Saved");
    }

    public GameData LoadGame()
    {
        if (File.Exists(filePath))
        {
            string json = File.ReadAllText(filePath);
            GameData gameData = JsonUtility.FromJson<GameData>(json);
            Debug.Log("Game Loaded");
            Debug.Log(gameData);
            return gameData;
        }
        Debug.Log("Save file not found!");
        return null;
    }
}

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

public class GameController : MonoBehaviour
{
   
    
        private SaveLoadManager saveLoadManager;

        private void Start()
        {
            saveLoadManager = GetComponent<SaveLoadManager>();
        }

       
        public void Save()
        {
            saveLoadManager.SaveGame(); 
        }

        
        public void Load()
        {
            GameData gameData = saveLoadManager.LoadGame();
            if (gameData != null)
            {
                foreach (ObjectData data in gameData.objects)
                {
                    GameObject obj = GameObject.Find(data.objectName);
                    if (obj != null)
                    {
                        
                        obj.transform.position  = data.position;
                        obj.transform.rotation  = data.rotation;
                        Debug.Log(data.objectName);
                        Debug.Log(data.position);
                    //Instantiate(obj, obt, obr);

                }
                }
            }
        }
}

 prefabName = obj.name.Replace("(Clone)", "").Trim(),