I've created an external object. Now I want to use it in Lightning App Builder. I dragged a filter list component onto the canvas. Then I was looking for this external object in the "Object" drop down. But I cannot see it there. In fact, I can only see case, contact, group and opportunity. Even other salesforce built-in objects aren't there.
I imported 2 of them from an external data source. My assumption is that regardless whether it's salesforce standard object, custom object or external object, after I created them, it should be transparent to lightning app builder. Maybe there is some place I need to explicitly configure to show this object in lightning app builder?
How can I get them to show up?