Collecting Line Item from Checkout Started Event into Klaviyo

Hello everyone,

I am currently experiencing an issue with the communication between the Checkout Started Event and Klaviyo. I have created an Abandoned Cart Flow with the purpose of sending reminder emails to customers.

I have inserted a code snippet to call the properties of the line_item to make the information explicit.

However, after receiving the email on Gmail or previewing the test on Klaviyo, the value of these properties (customization_id) appears as NONE.

It seems that no properties are being transmitted from Shopify to Klaviyo at all

Could you please help me identify where my issue lies? :((

May I know why Klaviyo is not receiving any properties data from Shopify?

Thank you for your assistance