Different suggestion from the much needed sub-outlines (see the 600+ voted on suggestion by Daniel Wyatt “Sub-Outlines in Outline”) which would bring in a collapsible feature in Outline.

This is about being able to assign, to different elements of the outline, headings which would be integrated into the Outline system. Right now the document may have different internal headings, but if I add these to the GoodNotes Outline, they are difficult to keep in their actual order.

The suggestion is as follows :
Include the most common and convenient method to add headings using the # (as is possible in Notion and in many coding markups).
Where adding in front of the text :
1 # (#)

encodes and presents the text as heading 1

2 # (##)

encodes and presents the text as heading 2

3 # (###)

encodes and presents the text as heading 3

And so forth

A way to get default headings in the Outline basically.
(Even the site understands my coding commands lol )