Problem:

When PDF files are sent via Broadcast, they don't display a thumbnail preview in the recipient's WhatsApp chat the way image files do. Instead, they appear as a generic document attachment. This makes PDFs less visually engaging and harder for recipients to recognise at a glance, especially compared to how PDFs appear when sent through other WhatsApp API providers.

Current limitation:

WhatsApp treats PDFs as a separate "document" message type from images. The way each message type displays in the recipient's chat is determined by WhatsApp itself, not SleekFlow — documents don't get a first-page thumbnail the way images do. There is currently no setting on SleekFlow's side to enable this.

Requested capability:

If technically possible, enable a thumbnail preview showing the first page of the PDF while still sending the file as a PDF document. This would bring the display in line with what some other WhatsApp API providers offer.

Attached picture 1 is from other BSP

picture 2 is from SleekFlow