The Angular framework includes its own library using  Observables called RxJS and Redux is a general-purpose state management library that can be used with any of the above frameworks or other view libraries, but is very commonly used with the React library.
The Angular framework utilizes its own Observable library called RxJS, while Redux is a general-purpose state management library that can be integrated with any of the mentioned frameworks or other view libraries but is commonly utilized in conjunction with React.