Have you tried this plugin GitHub - slnsys/obsidian-canvas2document: Plugin for Obsidian to convert a complete Canvas to a long form document
Basically the idea is to utilize canvas to brainstorm then use some plugin to convert the content from your nodes. I think this can be actually a functional idea because canvas already implements way to zoom out/in making it intuitive to work with node arrangement. Compared to this feature request canvas already scales well to arranging tens of nodes with arbitrary text length.