This is primarily how I use OO. I also use OO to outline a series of talks, devotions, etc., over a year’s time. I prefer to think about a presentation or article over a period of time in an incremental fashion before I begin to write. I find an iterative approach to produce better results.
Below is a screenshot of my outline for a presentation to a national foundation on leadership transitions. Notice two things: 1) there are collapsible note fields (see arrow), where you can add text, which gets exported with the outline. These can become draft text in your article or presentation. 2) you can add columns for additional information, notes, etc., for reference.
There is also a sidebar that allows you to select a topic heading to focus exclusively on that topic, which is helpful in a long outline. Also, whatever is selected gets exported. If nothing is selected, the entire outline is exported.
Once the outline is ready, I export to my writing app.
I hope that is helpful.