I agree that this would be useful, unfortunately there are deep technical reasons why we don’t do it.
The reason why bold, italic, setting links and other text editing actions are not shown in the Overview is that they are not real components. The app treats them as properties of the text. You can freely mark text with bold, italic and make links in arbitrary order and nesting, which makes it impossible for the app to track which component is which when you finish text editing. If we tried treating them like real components they would lose all their Options and other properties on every edit.
This means that if we add a span text editing command it would behave in the same way, it won’t be a real component.