I'm answering my own question:
With the device plugged in, open the Devices and Simulators Window
Select the device
You will see a table view of Installed Apps
Select the app of interest
At the bottom of the table view is the "gear" icon -- select it
Download Container will work, despite Show Container being empty
Using control-click in the Finder to Show Contents allows drilling down to the *.sqlite files.
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: