When paired with https://dbss.azureedge.net/ allows using any android tv or tablet as a customizable dashboard!
Dashboard Screensaver only mentions it supports Android TV/OS. Have you tried Dakboard Screensaver on Tablet as well?
Best link I could fine to enable this on tablet is https://blog.dakboard.com/use-dakboard-on-your-tablet/
Dakboard dashboards are just websites. They give you a unique URL for your dashboards. On a tablet it should be trivial to leave chrome open in fullscreen.
The Screensaver app sets android tv screensaver (after 5 min delay) to the webpage you configure.