Scroll anywhere in Scrolling Widget

// Create "ScrollController"
final ScrollController scrollController = ScrollController();

// Add "scrollController" to "controller" property inside Scroll widget
controller: scrollController,

// Now implement scrolling function
void onTap(){
  scrollController.animateTo(0, duration: Duration(seconds: 2), curve: Curves.easeInOut);
  // 0 is the offset
}