The Creator Kit helps you create Power Apps experiences on the web and mobile platforms with easy-to-use sample controls and components. The kit contains a component library, several commonly used Power Apps component framework controls, and other utilities that increase developer productivity.
All controls and components included in the kit use the Fluent UI framework to help you easily create consistent, beautiful, and effective user experiences for custom business applications.
Please refer below link for more information to download the kit and guidance –