Unfortunately, you cannot directly import a world into Minecraft Realms Bedrock. Realms is a separate service that runs on its own servers, and it doesn't allow for importing worlds from your local storage.
However, there are alternative ways to get your world onto a Realms server:
- Create a new world on Realms: You can start a new world on Realms and then manually build or recreate your existing world within it.
- Use a world editor: Some third-party world editors allow you to export your world in a format compatible with Realms. However, this method is not officially supported and may not always work as intended.
Remember that Realms is designed to be a collaborative experience, so it's always best to start fresh and work together with friends on building a new world.