Totally stream-of-conscience, thinking out loud here.
What if you one could somehow select the headers from the titles of the notes in a project (like the ones you demonstrated in the video for splitting notes), and then click on an additional option titled “mind map” “visual workflow” or whatever works for you folks, and then have a more visual example appear with folders, bubbles, whatever? The “folders, bubbles, whatever” would also be linked back to the original notes, of course.