Reactive Programming and State Management in Unreal Engine

I am coming from an Angular/RxJs perspective and attempting to learn C++. I am getting to the point in my development journey where I need to understand and manage game and player state.

I found a library called RxCpp developed for reactive programming in C++, but the library seems inactive. There is even a wrapper for RxCpp and unreal engine, but that library is also inactive.

Is there anyone using reactive programming in Unreal Engine?

Have u started using rxcpp in UE4