In Writer, the “outline view” is offered in the Navigator. The Navigator is in the right side pane by clicking on the compass icon. F5
if not already present.
The outline of your document is shown in the Headings section.
Notice it works only if you use the Heading n family to mark up your headings (chapter, sub-chapter, …). In advanced use, other paragraphs may also be shown in the outline, but practice first with the Heading n style family.
To show the community your question has been answered, click the ✓ next to the correct answer, and “upvote” by clicking on the ^ arrow of any helpful answers. These are the mechanisms for communicating the quality of the Q&A on this site. Thanks!
In case you need clarification, edit your question (not an answer which is reserved for solutions) or comment the relevant answer.