You can link the feed to any module in your Email Design System, you will need to add some extra syntax to the HTML.
First you have to define the module you want to pull content into. To do this, you add a feed tag right after the module tag, with a name attribute. The name can be whatever you want it to be.
<module name="textblock_feed" label="Full width feed 1"> <feed name="mod_feed"></feed>
Then on the fields that you want to pull content into, such as an image field or a text field, you need to add the feed-source attribute. The value for this will be liquid with three parts to it.
<field type="src" name="src" feed-source="{{feed.mod_feed.image}}">
Once you have set up this feed Syntax you will see a feeds tab when you go into the Design System settings in your account.