Hello, does anyone of you know an app that creates a product (e.g. SKU: GROUPED-PRODUCT) that is actually linking multiple existing products on Shopify (let's say ITEM-1, ITEM-2, and ITEM-3) but it is displayed as a simple product? Ideally, the grouped product should behave like a normal product i.e. the order should include separate item lines. We used Magento previously which had this feature but we could make it work on Shopify yet. I've tried a couple of apps but none of them seems to work for this use case.
Yes, Magento and WooCommerce support product group. So you may not get used to Shopify system. Shopify only supports 1 single type of product.
For your case, you can try to use an inventory app like Connected Inventory to link a product to several real products. When the virtual product is purchased, the inventories of the individual items are deducted by the inventory app. It's good if you're trying to make preset bundles, i.e. Bundle 1 = ITEM A + ITEM B + ITEM C are always fixed.
My app BYOB supports build-your-own bundles. It supports buying any x product in a collection, pay a fixed price or discounted price. A virtual product is created. When it's purchased, the item will be broken down into individual items.