Since Microsoft does not store your world data server-side with the exception of Realms, you'll need to manually copy your world data to your Switch, or upload your worlds to a Realm to download them. I hope this helps! ^SA
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Since Microsoft does not store your world data server-side with the exception of Realms, you'll need to manually copy your world data to your Switch, or upload your worlds to a Realm to download them. I hope this helps! ^SA