Folding text is already in the feature request list in relation to Markdown headers. I’d suggest adding an entry to it for asking for use with outline lists too.
In the future, I’d love to see the ability to collapse the text below Markdown headers, much like Folding Text does on the Mac, and Editorial on iOS.
Background: I keep a text document open on my Mac all day at the office, and take notes throughout the day as various matters arrive. Right now I use Folding Text on the Mac for this. When I move on from one matter (such as a phone call) to another, I collapse the previous matter by clicking on the Markdown header (pound symbol), which gives me a …