With the newest Hello Kitty Island Adventure update, LittleTwinStars, you will be required to find several Star Fragments to access a new area. The new Cloud Island region has been added to the list of places to explore. However, figuring out where to start and how to unlock this mysterious location can be pretty confusing if you have no idea where to start.
https://screenrant.com/hello-kitty-island-adventure-cloud-star-fragment-locations/