Does BYOB support stacking discounts on Shopify?

Discount Stacking

As of the latest update, bundles under the new Cart Transformation method will no longer generate variants in the backend. This means that discount stacking is no longer possible as the app now makes use of an automatic app discount under Shopify's Discounts section.

Users who have older bundles under the variant generation method can still apply Shopify discount codes to bundle products for an additional discount (discount stacking).

Doesn't Shopify support combining discounts?

Combining discounts is different from stacking discounts.

The combining feature states: "If an item is eligible for multiple discounts, only the largest discounts with apply". If you set up 2 discounts that can be combined, only the best discount is applied, i.e. only 1 discount is used.

With this in mind, you're still able to use Shopify's discount combination logic so long as you're on the latest version of the Cart Transformation feature. To enable discount combination, you'll need to go to BYOB > Settings and select the discount types that are eligible for combination with the app discount: