This is a setting example that can be seen on Rakuten, etc., where a coupon is displayed near the purchase button on the cart screen to encourage member registration. This is a method that allows you to insert code from the theme editor, along with a method for adding block elements to the subtotal section.
When presenting the discount amount, be sure to clearly state that this is the price after the coupon is applied to avoid any misunderstandings on the part of the purchaser.
