Please use this link as reference to the question, http://personalbesttheme.neto.com.au/shorts
Thank You
That particular design is specific to that theme. Are you using the Personal Best theme? If so, try adding "Cross Sell" items for the product.
Maybe this will help. I've never tried using this tweak, so I can't verify that it works, but it looks like exactly what you want.
https://developers.neto.com.au/documentation/neto-designer-documentation/tweak-documents/product-page/cross-sell-products/
