How to map a class field to LiveData

I have a class which runs in the background and handles the business logic, and it contains state variable like so. The implementation of the State enum is inside the interface implemented by Common class.

class Mine extends Common {
    public State state;
}

I have a view model which has one LiveData member to call the state of Mine class, Mine has been implemented with a Singleton pattern so I use Mine.getInstance().state to access state.

class MineViewModel : ViewModel() {
   val state: Flowable<State> = Flowable.fromCallable { return@fromCallable Mine.getInstance().state }

   private var _status : LiveData<State> = LiveDataReactiveStreams.fromPublisher(state)
   
   val status: LiveData<State>
      get() = _status
}

I update my UI with the help of the Binding Adapter on MineViewModel and fragment. Right now, I'm unable to update the _status in the View Model. I get the first value which for the sake of argument here is CREATED. I'm not sure what I am missing.