In GetX we have Reactive State Management and Simple State Management. Names are, IMHO, a bit misleading, as they are both reactive in some sense, but the first uses streams, and the second uses callbacks. The second was declared to be more performance-friendly. Examples:

First (with streams)

class Controller extends GetxController {
  var count = 0.obs;

  increment() {
    count.value++;
  }
}

It should be consumed using Obx or GetX widgets.

Second (with callbacks)

class Controller extends GetxController {
  int counter = 0;
  void increment() {
    counter++;
    update(); 
  }
}

It should be consumed using the GetBuilder widget alone.

Now, the question is:

Are there both stream/callback approaches in Riverpod?

Can you provide analog examples of the above?