My specific issue is that whatever I saw in the screenshots and description of the plugin is not what I got when I deployed it to Cockpit.
Looking at the source code for the plugin, I saw that the "Durations" tab was commented out from the HTML markup located in the dashboard.html under /src/main/resources/plugin-webapp/statistics-plugin/dashboard.html. I uncommented that markup, re-deployed the plugin and got the Durations tab to show, but with no graph or content inside it.
In addition, the "Timings" and "Statistics" tabs do not seem to reflect the fields that we see in the screenshots of the documentation.
My guess is that the plugin is still not ready for Camunda 7.3...
Thanks
Isaac