In our app, we have designed the root page of the app to load another MDK page using Tabbed control. Inside the Tabbed Page we are using SectionedTable to create the container. Inside the container there is an Extension control within a ObjectCollection, and for the bottom section we have ObjectTable.
Use case: When the user opens up the app, and being navigated into the root page/home screen, there is a noticeable delay in loading the content between the objectTable(which loads almost immediately with whatever data it had persisted during previous session) and ObjectCollection(which uses the extension control).
I have shared recording of the user flow along with this post, also please find the project metadata inside the same link.