You can build and publish your own island using the Fortnite Creator Portal , which includes tools for managing public metadata, thumbnails, and engagement payouts.
While there is no single established project titled "Rising Island," the concept of "rising islands" is a popular theme in modern game development, appearing in everything from indie devlogs to major creative platforms. rising-island-game-link
Large-scale platforms allow users to publish their own "Rising Island" experiences through official creator programs. You can build and publish your own island