Why is my upsell item not appearing?

There are three reasons why an upsell item may not appear.

1. The product is out of stock or unavailable. Verify that your product / variants are in stock and available for sale.
2. The upsell product is already in your cart. An upsell item is only displayed when it’s not already in the user's cart.
3. The product's handle has changed. The handle is a part of the url (example: mystore.com/products/). If this is the case, delete and re-add the upsell product (in the app not the actual product).