The First Aid media is not synced. To access the First Aid or Boards and Beyond content, you will need a separate subscription to that resource. You can learn more about how this integration works here: McGraw Hill Integration FAQ
You can also understand more about each field here: ✏️ What do all the fields mean in the AnKing Step Deck?
There’s only a problem when you see broken images, predominantly in the Extra field. The screenshot shows the image in that field is displayed correctly.