ProjectDDD/Assets/_DDD/_Scripts/GameState/GameState.cs

using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.AddressableAssets;

namespace DDD
{
    [CreateAssetMenu(fileName = "GameState", menuName = "GameState/GameState")]
    public class GameState : ScriptableObject
    {
        [SerializeField] private AssetReference _gameLevelState;
        
        public GameLevelState LevelState { get; private set; }

        private bool _isLoaded;

        private void OnDisable()
        {
            if (_isLoaded == false) return;

            _gameLevelState.ReleaseAsset();
            _isLoaded = false;
        }

        public async Task LoadData()
        {
            if (_isLoaded)
            {
                return;
            }

            var gameLevelStateHandle = _gameLevelState.LoadAssetAsync<GameLevelState>();
            await gameLevelStateHandle.Task;

            LevelState = gameLevelStateHandle.Result;
            Debug.Assert(LevelState != null, "GameLevelState is null");

            _isLoaded = true;
        }
    }
}