I, too, consider this essential.
Attempting to understand these relationships today is an extremely tedious manual process. My current attempt to make an automated visual solution is not yet functional. And it still has the manual step of finding all tags and fields locally, then copying and pasting a text file. I post-process the file with Wolfram Mathematica (probably a rare tool among Tana users).
Neither of my issues from last year—only one window allowed and app window occupying the whole screen on launch—has been addressed.
I still consider the app unusable if I can't have multiple windows open. This makes the desktop app very unlike the browser system, contrary to the claim in the documentation for the Desktop that they are essentially the same.