Hello CarolBrumfield1350591
if you are presently using the personalized view where the menu is off to the left of the screen, go to your profile picture in the top right, then click on New Features. A new window will open to toggle off the personalized view. Once your view has updated, navigate to a page that does not have a lot going on or create a nearly blank custom page as the page will be copied. Then click the project picker in the top left and then the + sign below the Recent Projects section to expand all. Ctrl + A to select all and paste into Excel. Trim as needed.
Then, go back to the New Feature menu to toggle the personalized view on again.
Not sure what do you mean with visual hierarchy of user stories? Have you explored Work Views or the Deep Export app?