You probably know more than me, but just in case this helps, I have a pretty simple workflow when composing text in conjunction with images, embedded notes, mermaid diagrams, etc.
You would want to see the preview in one pane, but be able to type without having to constantly toggle between edit and preview mode. I like to keep the preview pane pinned, so that when you click the link icon on embedded notes, they open in the other pane.
Eventually I think there will be the ability to edit in preview mode, or “what you see is what you get” WYSIWYG, like in Typora, but don’t quote me on that. I think there are other threads about this, but I am not current on all the information.