What happens to an offer when a product in it is out of stock? (Essential Upsell app)

Essential Upsell only shows products that are available to buy:

• A product is shown if at least one of its variants is available.
• A product whose variants are all sold out is hidden from the offer. The other products in the offer still show.
• If all products in the offer are sold out, there is nothing to show, so the offer does not appear.

Hiding products on the storefront does not unpublish the offer or change its settings in the admin. When the products are back in stock, they appear again automatically.

If an offer has a product that is unavailable in a customer's market or is not published to the Online Store sales channel, that product is also hidden. Check that the products are published to the Online Store and available in the markets you sell in.