The default Windows overview for Gnome-shell user interface shows the all currently opend windows. But after installing the “enhace overview” extension you will be able to show windows for a specific application which is currently have multiple windows running.
Vidoe Preview for Enhance Overview Extension
According to the developer the extensions has some bugs which will be fixed in the upcoming release, also it will include some new features.
Drag is little uggly and has a silly workaround.
Sometimes if you change workspace in one application mode some windows in overview disappears.
Bug fixes written above
Hide icons in over lay Icon extension when one application mode active.
Compatibility with native window placement extension(maybe).