First, ensure that all images you have added for the listing are marked to be publicly visible, meaning the images are not marked in the Does not appear in the sales announcement section. For more detailed information on managing images, you can find it from this article.
It's also important to note that publishing platforms (e.g., Etuovi or Oikotie) may limit the number of images visible in a publication depending on the service package you have. Therefore, we also recommend checking your service agreement with the publishing platform.