10.cs

public class OrientationSetter : MonoBehaviour
{
    private void Awake()
    {
        StartCoroutine(SetupInitialOrientation());
    }

    private static IEnumerator SetupInitialOrientation()
    {
        if (PlayerPrefsUtils.HasOrientation())
        {
            if (PlayerPrefsUtils.IsPortrait())
            {
                if (Screen.orientation != ScreenOrientation.Portrait)
                {
                    Screen.orientation = ScreenOrientation.Portrait;
                    yield return new WaitForSeconds(3);
                    LoadScene();
                }
            }
            else
            {
                if (Screen.orientation != ScreenOrientation.Landscape)
                {
                    Screen.orientation = ScreenOrientation.Landscape;
                    yield return new WaitForSeconds(3);
                    LoadScene();
                }
            }
            yield break;
        }

        LoadScene();
    }

    private static void LoadScene()
    {
        SceneManager.LoadSceneAsync("SampleScene");
    }
}