We had this info in the title bar at some point but that was removed for some reason. Maybe it's a matter of giving plugins access to the title bar so that it can be customised.
Edit: that was the discussion: Testing - v1.8.2 - Title Bar Path Format (Minor) - #17 by laurent
And the pull request: Desktop: resolve #3695: Show notebook and note title in the title bar by asrient · Pull Request #4390 · laurent22/joplin (github.com)