Website news items are shown on your "Latest News" page in date descending order (newest items first) as well as on your sidebar (for items set as "featured").
To create a news item, click the "Add News Item" button.
You can also choose to have your homepage display your latest news items by going to Setup > Website > Settings and enabling Show News On Homepage.
This will replace your whole homepage with your latest news items list.
If you upload a featured image, that image will be displayed in your sidebar (if set to be a featured news item) above the intro text.
Editing News Content
With Enable block editor switched on for a modern website, new news items open in the modern website builder after creation. To return to an item, open its details and click Edit Page Content. Draft changes save automatically; click Preview to check them and Publish to update the public content.
Existing news items with legacy content keep their current editor. For the original editor, follow Drag & Drop Page Editor and use Save. Choosing a modern website design does not automatically convert existing news content into blocks.