Hi @lisaspencer and welcome back to the Community!
Would you be willing to share more about the type of data that you want to collect from checkout? By default, our Magento integration collects the data referenced in this Help Center Article.
If you would want to gather more data at checkout, you have a few options. For starters, you could use a Legacy Form. Using this sort of form (example, embed legacy form) can make it so you can add additional fields to your checkout area with new orders.
Otherwise, you would have to build a custom placed order event that collects more data than the default Magento metric. I would recommend speaking with your developers or reaching out to a Klaviyo Partner if you need further assistance on getting this set up.
I hope this helps get you started, and thanks for using the Community!
- Brian