The workspace switcher popup doesn't provide previews by default. Is there any way to enable them? The Workspace List that shows up on the right when super key is pressed does have preview.
You could do that via a
Download the zip file and either use
gnome-tweak-tool to install it or extract the archive and move the resulting directory to
note the name of the extension directory (it has to match the
then inside that directory, edit the
metadata.json and replace
3.8 with your
gnome-shell version, e.g.
save, restart both
gnome-shell (Alt+F2 then r) and
gnome-tweak-tool and use the latter to enable the extension: