get script attachment through service

Hi Can anyone help here. I got this from https://www.drupal.org/project/drupal/issues/3042383#comment-14205901

So my requirement is as below:
I have a media type named youtube_video and this media has a plain text field to capture youtube url and from manage display config i have configured this field to show as oEmbed content
Now this youtube url is rendered as an iframe and I want to inject the GTM script within this iframe

So when i doing research, I came across https://www.drupal.org/project/drupal/issues/3042383 issue and from https://www.drupal.org/project/drupal/issues/3042383#comment-14205901 i got below code snippet which is using \Drupal::service('google_tag.container_manager') service . but this service is no longer exists on 2.x version of google_tag module.

/**
 * Implements hook_preprocess_media_oembed_iframe().
 */
function YOUR_THEME_preprocess_media_oembed_iframe(array &$variables) {
  if ($variables['resource']->getProvider()->getName() === 'YouTube') {
    $variables['media'] = str_replace('?feature=oembed', '?feature=oembed&enablejsapi=1', (string) $variables['media']);
  }
  $variables['#attached']['html_response_attachment_placeholders']['scripts'] = '<js-placeholder token="' . $variables['placeholder_token'] . '">';
  $variables['#attached']['html_response_attachment_placeholders']['head'] = '<head-placeholder token="' . $variables['placeholder_token'] . '">';
  // Add GTM.
  \Drupal::service('google_tag.container_manager')->getScriptAttachments($variables);
}

Is there any way to achieve my requirement with 2.x version of google tag module?

Can anyone from the module maintainers help here?

hi is there any update here