focusNode property
Defines the keyboard focus for this widget.
The focusNode is a long-lived object that's typically managed by a StatefulWidget parent. See FocusNode for more information.
To give the keyboard focus to this widget, provide a focusNode and then use the current FocusScope to request the focus:
FocusScope.of(context).requestFocus(myFocusNode); This happens automatically when the widget is tapped.
Implementation
final FocusNode? focusNode;