In the Shopify Admin's order detail page, there's a section called "Conversion summary" (with a link for "Conversion details"):

This section provides conversion information such as the following:

• Total sessions before placing the order
• Order index
• Days to conversion
• Date and time of when the first and last visits occurred
• Landing page URLs of the first and last visits
• UTM parameters from the first and last visits

EZ Exporter can export these data via the customer_journey_summary fields. 

Simply select these fields under the "Fields" section of the Data Settings to include them in your CSV/Excel export:

On the "Templates" page of the app, there's also a pre-built template you can use called "Conversion Summary & UTM Parameters (Last 30 Days)" which already includes these fields and can be customized further.