You can make a template with a media header, specifically image, video, or document. If the templates with a media header were rejected immediately when it was just submitted, it's normal, because templates with images as a header require an appeal for approval. Our team will periodically check our approval/rejection template system to help the template get approval. Therefore, you don't have to worry if the template gets rejected the first time you just submit it.
Note: Please ignore the rejected status on the dashboard. When the templates are finally approved, the status on the Multichannel dashboard will also be automatically approved.