diff --git a/packages/dropdown_button2/CHANGELOG.md b/packages/dropdown_button2/CHANGELOG.md
index c2e789e..d96c1ea 100644
--- a/packages/dropdown_button2/CHANGELOG.md
+++ b/packages/dropdown_button2/CHANGELOG.md
@@ -14,6 +14,7 @@
 - Update SDK constraints: ">=3.4.0 <4.0.0"
 - Fix DropdownButtonFormField clips text when large text scale is used [Flutter core].
 - Fix DropdownButtonFormField padding when ButtonTheme.alignedDropdown is true [Flutter core].
+- Add barrierCoversButton to DropdownButtonFormField2.
 
 ## 3.0.0-beta.21
 
diff --git a/packages/dropdown_button2/lib/src/dropdown_button2.dart b/packages/dropdown_button2/lib/src/dropdown_button2.dart
index cdc8313..01f40df 100644
--- a/packages/dropdown_button2/lib/src/dropdown_button2.dart
+++ b/packages/dropdown_button2/lib/src/dropdown_button2.dart
@@ -116,9 +116,9 @@ class DropdownButton2<T> extends StatefulWidget {
     this.customButton,
     this.openWithLongPress = false,
     this.barrierDismissible = true,
+    this.barrierCoversButton = true,
     this.barrierColor,
     this.barrierLabel,
-    this.barrierCoversButton = true,
     this.openDropdownListenable,
     // When adding new arguments, consider adding similar arguments to
     // DropdownButtonFormField.
@@ -132,37 +132,37 @@ class DropdownButton2<T> extends StatefulWidget {
   const DropdownButton2._formField({
     super.key,
     required this.items,
-    this.selectedItemBuilder,
+    required this.selectedItemBuilder,
     required this.valueListenable,
     required this.multiValueListenable,
-    this.hint,
-    this.disabledHint,
+    required this.hint,
+    required this.disabledHint,
     required this.onChanged,
-    this.onMenuStateChange,
-    this.style,
-    this.underline,
-    this.isDense = false,
-    this.isExpanded = false,
-    this.focusNode,
-    this.autofocus = false,
-    this.enableFeedback,
-    this.alignment = AlignmentDirectional.centerStart,
-    this.buttonStyleData,
+    required this.onMenuStateChange,
+    required this.style,
+    required this.isDense,
+    required this.isExpanded,
+    required this.focusNode,
+    required this.autofocus,
+    required this.enableFeedback,
+    required this.alignment,
+    required this.buttonStyleData,
     required this.iconStyleData,
     required this.dropdownStyleData,
     required this.menuItemStyleData,
-    this.dropdownSearchData,
-    this.dropdownSeparator,
-    this.customButton,
-    this.openWithLongPress = false,
-    this.barrierDismissible = true,
-    this.barrierColor,
-    this.barrierCoversButton = true,
-    this.barrierLabel,
-    this.openDropdownListenable,
+    required this.dropdownSearchData,
+    required this.dropdownSeparator,
+    required this.customButton,
+    required this.openWithLongPress,
+    required this.barrierDismissible,
+    required this.barrierCoversButton,
+    required this.barrierColor,
+    required this.barrierLabel,
+    required this.openDropdownListenable,
     required InputDecoration inputDecoration,
     required bool isEmpty,
-  })  : _inputDecoration = inputDecoration,
+  })  : underline = null,
+        _inputDecoration = inputDecoration,
         _isEmpty = isEmpty;
 
   /// The list of items the user can select.
@@ -338,6 +338,11 @@ class DropdownButton2<T> extends StatefulWidget {
   /// Whether you can dismiss this route by tapping the modal barrier.
   final bool barrierDismissible;
 
+  /// Specifies whether the modal barrier should cover the dropdown button or not.
+  ///
+  /// Defaults to true.
+  final bool barrierCoversButton;
+
   /// The color to use for the modal barrier. If this is null, the barrier will
   /// be transparent.
   final Color? barrierColor;
@@ -348,11 +353,6 @@ class DropdownButton2<T> extends StatefulWidget {
   /// accessibility tools (like VoiceOver on iOS) focus on the barrier.
   final String? barrierLabel;
 
-  /// Specifies whether the modal barrier should cover the dropdown button or not.
-  ///
-  /// Defaults to true.
-  final bool barrierCoversButton;
-
   /// A [Listenable] that can be used to programmatically open the dropdown menu.
   ///
   /// The [openDropdownListenable] allows you to manually open the dropdown by modifying its value.
@@ -985,6 +985,7 @@ class DropdownButtonFormField2<T> extends FormField<T> {
     Widget? customButton,
     bool openWithLongPress = false,
     bool barrierDismissible = true,
+    bool barrierCoversButton = true,
     Color? barrierColor,
     String? barrierLabel,
     Listenable? openDropdownListenable,
@@ -1056,6 +1057,7 @@ class DropdownButtonFormField2<T> extends FormField<T> {
                   customButton: customButton,
                   openWithLongPress: openWithLongPress,
                   barrierDismissible: barrierDismissible,
+                  barrierCoversButton: barrierCoversButton,
                   barrierColor: barrierColor,
                   barrierLabel: barrierLabel,
                   openDropdownListenable: openDropdownListenable,