
Since I imagine some sort of function exists to figure out all the frames, I'm wondering if it wouldn't be possible to create a button that would let us check this list for any given element at will.
As for possible applications, it's mostly just for navigation purposes. Recheck other usages of the element in the case to ensure consistency, check if it's being overused or underused, check if there are elements not being used for any reason.
A bunch of organisational details. Nothing in any way urgent.
I just thought it might be relatively easy to implement, though I am not certain it would. As you can see, it doesn't provide too much benefit, so it might not be worth it at all.
And for the positioning of said button, the easiest way would be to position it right next to wherever the delete buttons are, as there's space. And as the safeguard of dependencies exists, I would hope it wouldn't be too destructive to misclick the delete button.
Finally, you might say "You could just try to delete the element to see the list." and you would be... correct. However, my own paranoia would lead me to fear deleting an element which isn't used anywhere and I thought it was.