I use workspaces heavily, and I have another visual indicator in the top bar to tell me what workspace I am in. By default Gnome has a number like in the screenshot below to show current workspace
I do not need the default workspace indicator, however there does not seem to be a setting in Gnome Tweak Tool to disable it.
This question pointed me towards an extension to disable the overlay effect, which was pretty annoying. However I haven't found an extension that disables the workspace number, or settings anywhere.