For now the only thing you can do with the Block Element is to set it to Hook and set it to generate_before_right_sidebar or generate_after_right_sidebar – so it can be either at the Top or the Bottom only.
I have not explained well.
My homepage is made up of sections, and when I select the option to show the sidebar it doesn’t appear.
That’s why I don’t know if the sections are activated I can’t have a sidebar.