Why can't I see the volume discount table on some product pages?
The volume discount table is generated if a product has multiple offers based on its quantity which is called the Volume Discount. Unfortunately, Discounted Upsell does not have this type of offer on its list of options.
How can I put a discount table on the upsell pop-up if it can only be generated based on the type of offer?
It is not yet possible to create a discount table within the upsell pop-ups. You can install our Discounted Pricing app instead to be able to have this feature. However, If you have both of these apps installed, you can only choose one offer at a time so that each app would work for each product as expected.