A bundled product has its own SKU, quantity and price. By default, the products that make up the bundle are combined into the options field which can be then posted to QuickBooks description field. Or if your bundle sku matches with the item name/number of an assembly item in QuickBooks, then the corresponding assembly/group will get created with posting to QuickBooks.
Here is a screenshot of bundle products in an order in Magento
Here is the corresponding order within the eCC interface:
There is a setting within eCC, that can bring in the bundled items as separate products. This setting is within the store configuration->Orders screen.
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