Based on Sent, Delivered, Read statistics or the buttons customer has clicked on, You can retarget them using the retarget broadcast button. Your target channel must be WhatsApp only.

This is available under Broadcast > Analytics > View Broadcast 

You can select/unselect the boxes depending on which conditions you want to retarget the customer and it’ll create a target segment based on your selection.

Once you click on the ‘Next’ button, it’ll take you to the create a broadcast page. Wherein your ‘target segment’ would be selected by default based on your selection.