Show child pages of a page that’s part of a custom post type

Using Pods, I created a custom post type and added hierarchy support. I then created a whole bunch of pages associating them as appropriate to parent pages.

I would now like to use the Flexi Pages Widget to display a list of all of a page’s child pages.

So, I have a page for a county in the US. On that page I want to show a list of all of the different cities that are a child to that county.

I tried what I thought would work but it’s coming back empty. If it makes a difference, I embedded the widget via Beaver Builder. Thanks.