Can we show multiple products in a Post Purchase offer?
Only one offer product can be shown in Post Purchase offers. If you select more than one, only the first will be shown. For ease of viewing, it is also recommended to a choose product with 10 or fewer variants as they will display in a single drop down.
To see how to set up a Post Purchase offer, please visit this Help Center article: https://support.boldcommerce.com/hc/en-us/articles/20282970543124-Create-a-Post-Purchase-Offer