The shortcode to be used in the template is
{product_block}
In the admin setting, you can choose a template for this block

Product Block Template 1

Product Block Template 2

Product Block Template 3

Developer Note:
You can add more templates yourself. The location for adding the template is
catalog/view/theme/default/template/extension/module/oc2/order_review_product_templates/
catalog/view/theme/default/template/extension/module/oc3/order_review_product_templates/