Setup Product List Combo
Now you will return to the Shopify admin and click on Discounts, and then click on Create discount button.
You should set up the discount as described in the Product List Combo.
In the Product List setting, click on Product Settings tab, then click on Products and add the products that you want to use to the Product List combo.
You can click on the component you want to edit within the section, and the corresponding settings will open on the left side.