How can I feature multiple products in an upsell widget?

You can easily add upsell widgets for multi product. Here are the simple steps

1. Go to Checkout Extension Pro app Dashboard then click on Manage button of checkout upsells section.

2. Then add a upsell widget.

2. There are lots of options for displaying widgets.

Note - if you want to show Multi Products Upsell so you can select upsell type (Multi Product Upsell)

3. Then finally you have to save your changes.