That's too bad - I think if it was built-in to the normal-single click of the filename in the titlebar, it would be a silently used but often-handy feature to have.
As per your suggestion, I've gone ahead and sent this suggestion via the Feedback Hub - if anyone can help upvote it that would be great:
https://aka.ms/AA99idb
A summary of my suggestion in the link above:
Find the location of a file that is already open in an app:
This feature in MacOS is a subtle one but a very handy one: when I have a file open in an app, let's say, MS Word, and I need to know where the file is saving to OR I need to quickly open that folder, all I had to do is right click on the filename up in
the titlebar of the app and it would display the path of the file in a vertical orientation - from this display, I would know where the file is AND if I wanted to, I would simply click on any of the folders in that path that I wanted to open up in the Finder
window - I don't think this is a Apple-patented feature and as a reconverted Windows user, I'm sure this can easily be subtly included in a future update where I do a normal-click on the file name up in the titlebar and instead of no action (current), the
user would get a context-rich drop-down menu which would include, in addition to the full address path, a bunch of existing File Explorer commands such as, "Copy", "Send to", "Open file location".
I know it's a fat chance that the Windows team will have any interest in copying what already exists in MacOS but here's to hoping.
Thanks!