The following "Lineitem Group" fields are now availabe in EZ Exporter when creating Shopify order reports:

• line_items.line_item_group.id - Lineitem Group ID (type: text)
• line_items.line_item_group.quantity - Lineitem Group Quantity (type: number). The quantity of the line item group (bundle)
• line_items.line_item_group.title - Lineitem Group Title (type: text). The title of the line item group (bundle) to which the line item belongs to

If you use the official Shopify Bundles app, these fields will provide the data about the bundle each line item in the order is part of. 

In the Shopify Admin's order detail page, the bundle info is displayed under the line item next to the label "Part of:".

To export that bundle name, simply select the field line_items.line_item_group.title in EZ Exporter.

Here's a sample output: