From your leads dashboard, click Collect Leads. (Alternatively, you can also use the blue 'lead segmentation' button to filter by just abandoned checkouts).

Then scroll to 'Collect leads from abandoned checkouts' and click here.

This will land you back on the leads dashboard but with a filtered view of just abandoned checkout leads. You can save this as a segmented list by clicking here. This will make it easily accessible above your lead list.