As an Intranet admin, team admin or Network admin you can choose to organize the menus and pages to display content per your requirement, refer instructions here to achieve the same;

1. Navigate to Pages within teams then click “Page Tools”, if Intranet then “Tools” within Company

2. Click “Organize Menus & Pages” from the drop-down

3. To re-order pages simply drag and drop them above/below or indent them to create a 1-level hierarchy of nested pages. Select the checkbox against the page name if you want it to be included in the menu structure.