padding property
final
The padding around the button's icon. The entire padded icon will react to input gestures.
If ThemeData.useMaterial3 is set to false, apply padding in the square proportion to the button's splash/highlight shape. For example, if the button is a circle, use padding on all sides to center the icon inside the splash/highlight circle. Otherwise, wrap the IconButton with a Padding widget to apply padding in the desired direction.
This property can be null. If null, it defaults to 8.0 padding on all sides.
Implementation
final EdgeInsetsGeometry? padding;