Can I put a dish photo in a WhatsApp offer message?

Yes, on the WhatsApp Business API. A message template can have a header with an image, video, GIF, document or location instead of plain text.

• The body text can be up to 1024 characters and the footer up to 60.
• A template can have up to 10 buttons in total, with at most two URL buttons and one phone button.
• Offers are marketing templates, so the customer must have opted in.
• Use a clear photo of one dish and add a button that links to your menu.