ProjectDDD/Assets/_DDD/_Scripts/GameData/GameData.cs

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

namespace DDD
{
    [CreateAssetMenu(fileName = "GameData", menuName = "GameData/GameData")]
    public class GameData : ScriptSingleton<GameData>
    {
        [SerializeField] private AssetReference _gameLocalizationData;

        public GameLocalizationData LocalizationData { get; private set; }

        private bool _isLoaded;

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

            var gameLocalizationDataHandle = _gameLocalizationData.LoadAssetAsync<GameLocalizationData>();
            await gameLocalizationDataHandle.Task;
        
            LocalizationData = gameLocalizationDataHandle.Result;
            Debug.Assert(LocalizationData != null, "GameLocalizationData is null");

            _isLoaded = true;
        }

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

            _gameLocalizationData.ReleaseAsset();
            _isLoaded = false;
        }
    }
}