diff --git a/React/Fabric/Mounting/MountItems/RCTCreateMountItem.h b/React/Fabric/Mounting/MountItems/RCTCreateMountItem.h
new file mode 100644
index 00000000000..6376094894d
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTCreateMountItem.h
@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTMountItemProtocol.h>
+#import <React/RCTPrimitives.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class RCTComponentViewRegistry;
+
+/**
+ * Creates a ready-to-mount component view.
+ */
+@interface RCTCreateMountItem : NSObject <RCTMountItemProtocol>
+
+- (instancetype)initWithComponentName:(NSString *)componentName
+                                  tag:(ReactTag)tag;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/React/Fabric/Mounting/MountItems/RCTCreateMountItem.mm b/React/Fabric/Mounting/MountItems/RCTCreateMountItem.mm
new file mode 100644
index 00000000000..df04396b476
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTCreateMountItem.mm
@@ -0,0 +1,33 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTCreateMountItem.h"
+
+#import "RCTComponentViewRegistry.h"
+
+@implementation RCTCreateMountItem {
+  NSString *_componentName;
+  ReactTag _tag;
+}
+
+- (instancetype)initWithComponentName:(NSString *)componentName
+                                  tag:(ReactTag)tag
+{
+  if (self = [super init]) {
+    _componentName = componentName;
+    _tag = tag;
+  }
+
+  return self;
+}
+
+- (void)executeWithRegistry:(RCTComponentViewRegistry *)registry
+{
+  [registry dequeueComponentViewWithName:_componentName tag:_tag];
+}
+
+@end
diff --git a/React/Fabric/Mounting/MountItems/RCTDeleteMountItem.h b/React/Fabric/Mounting/MountItems/RCTDeleteMountItem.h
new file mode 100644
index 00000000000..a4c6077b56f
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTDeleteMountItem.h
@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTMountItemProtocol.h>
+#import <React/RCTPrimitives.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Deletes (returns to recycle pool) a component view.
+ */
+@interface RCTDeleteMountItem : NSObject <RCTMountItemProtocol>
+
+- (instancetype)initWithComponentName:(NSString *)componentName
+                                  tag:(ReactTag)tag;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/React/Fabric/Mounting/MountItems/RCTDeleteMountItem.mm b/React/Fabric/Mounting/MountItems/RCTDeleteMountItem.mm
new file mode 100644
index 00000000000..99909f450cc
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTDeleteMountItem.mm
@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTDeleteMountItem.h"
+
+#import "RCTComponentViewRegistry.h"
+
+@implementation RCTDeleteMountItem {
+  NSString *_componentName;
+  ReactTag _tag;
+}
+
+- (instancetype)initWithComponentName:(NSString *)componentName
+                                  tag:(ReactTag)tag
+{
+  if (self = [super init]) {
+    _componentName = componentName;
+    _tag = tag;
+  }
+
+  return self;
+}
+
+- (void)executeWithRegistry:(RCTComponentViewRegistry *)registry
+{
+  UIView<RCTComponentViewProtocol> *componentView = [registry componentViewByTag:_tag];
+  [registry enqueueComponentViewWithName:_componentName tag:_tag componentView:componentView];
+}
+
+@end
diff --git a/React/Fabric/Mounting/MountItems/RCTInsertMountItem.h b/React/Fabric/Mounting/MountItems/RCTInsertMountItem.h
new file mode 100644
index 00000000000..e3d4ac29d7a
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTInsertMountItem.h
@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTMountItemProtocol.h>
+#import <React/RCTPrimitives.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class RCTComponentViewRegistry;
+
+/**
+ * Inserts a component view into another component view.
+ */
+@interface RCTInsertMountItem : NSObject <RCTMountItemProtocol>
+
+- (instancetype)initWithChildTag:(ReactTag)childTag
+                       parentTag:(ReactTag)parentTag
+                           index:(NSInteger)index;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/React/Fabric/Mounting/MountItems/RCTInsertMountItem.mm b/React/Fabric/Mounting/MountItems/RCTInsertMountItem.mm
new file mode 100644
index 00000000000..f714cb0a70d
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTInsertMountItem.mm
@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTInsertMountItem.h"
+
+#import "RCTComponentViewRegistry.h"
+
+@implementation RCTInsertMountItem {
+  ReactTag _childTag;
+  ReactTag _parentTag;
+  NSInteger _index;
+}
+
+- (instancetype)initWithChildTag:(ReactTag)childTag
+                       parentTag:(ReactTag)parentTag
+                           index:(NSInteger)index
+{
+  if (self = [super init]) {
+    _childTag = childTag;
+    _parentTag = parentTag;
+    _index = index;
+  }
+
+  return self;
+}
+
+- (void)executeWithRegistry:(RCTComponentViewRegistry *)registry
+{
+  UIView<RCTComponentViewProtocol> *childComponentView = [registry componentViewByTag:_childTag];
+  UIView<RCTComponentViewProtocol> *parentComponentView = [registry componentViewByTag:_parentTag];
+
+  [parentComponentView mountChildComponentView:childComponentView
+                                         index:_index];
+}
+
+@end
diff --git a/React/Fabric/Mounting/MountItems/RCTMountItemProtocol.h b/React/Fabric/Mounting/MountItems/RCTMountItemProtocol.h
new file mode 100644
index 00000000000..f46c397498b
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTMountItemProtocol.h
@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class RCTComponentViewRegistry;
+
+/**
+ * Granular representation of any change in a user interface.
+ */
+@protocol RCTMountItemProtocol <NSObject>
+
+- (void)executeWithRegistry:(RCTComponentViewRegistry *)registry;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/React/Fabric/Mounting/MountItems/RCTRemoveMountItem.h b/React/Fabric/Mounting/MountItems/RCTRemoveMountItem.h
new file mode 100644
index 00000000000..0fe9555a613
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTRemoveMountItem.h
@@ -0,0 +1,26 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTMountItemProtocol.h>
+#import <React/RCTPrimitives.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Removes a component view from another component view.
+ */
+@interface RCTRemoveMountItem : NSObject <RCTMountItemProtocol>
+
+- (instancetype)initWithChildTag:(ReactTag)childTag
+                       parentTag:(ReactTag)parentTag
+                           index:(NSInteger)index;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/React/Fabric/Mounting/MountItems/RCTRemoveMountItem.mm b/React/Fabric/Mounting/MountItems/RCTRemoveMountItem.mm
new file mode 100644
index 00000000000..d46b936dd04
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTRemoveMountItem.mm
@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTRemoveMountItem.h"
+
+#import "RCTComponentViewRegistry.h"
+
+@implementation RCTRemoveMountItem {
+  ReactTag _childTag;
+  ReactTag _parentTag;
+  NSInteger _index;
+}
+
+- (instancetype)initWithChildTag:(ReactTag)childTag
+                       parentTag:(ReactTag)parentTag
+                           index:(NSInteger)index
+{
+  if (self = [super init]) {
+    _childTag = childTag;
+    _parentTag = parentTag;
+    _index = index;
+  }
+
+  return self;
+}
+
+- (void)executeWithRegistry:(RCTComponentViewRegistry *)registry
+{
+  UIView<RCTComponentViewProtocol> *childComponentView = [registry componentViewByTag:_childTag];
+  UIView<RCTComponentViewProtocol> *parentComponentView = [registry componentViewByTag:_parentTag];
+
+  [parentComponentView unmountChildComponentView:childComponentView
+                                           index:_index];
+}
+
+@end
diff --git a/React/Fabric/Mounting/MountItems/RCTUpdateLayoutMetricsMountItem.h b/React/Fabric/Mounting/MountItems/RCTUpdateLayoutMetricsMountItem.h
new file mode 100644
index 00000000000..378c179d3c4
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTUpdateLayoutMetricsMountItem.h
@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTMountItemProtocol.h>
+#import <React/RCTPrimitives.h>
+#import <fabric/core/LayoutMetrics.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Updates layout metrics of a component view.
+ */
+@interface RCTUpdateLayoutMetricsMountItem : NSObject <RCTMountItemProtocol>
+
+- (instancetype)initWithTag:(ReactTag)tag
+           oldLayoutMetrics:(facebook::react::LayoutMetrics)oldLayoutMetrics
+           newLayoutMetrics:(facebook::react::LayoutMetrics)newLayoutMetrics;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/React/Fabric/Mounting/MountItems/RCTUpdateLayoutMetricsMountItem.mm b/React/Fabric/Mounting/MountItems/RCTUpdateLayoutMetricsMountItem.mm
new file mode 100644
index 00000000000..c61a043626a
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTUpdateLayoutMetricsMountItem.mm
@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTUpdateLayoutMetricsMountItem.h"
+
+#import "RCTComponentViewRegistry.h"
+
+using namespace facebook::react;
+
+@implementation RCTUpdateLayoutMetricsMountItem {
+  ReactTag _tag;
+  LayoutMetrics _oldLayoutMetrics;
+  LayoutMetrics _newLayoutMetrics;
+}
+
+- (instancetype)initWithTag:(ReactTag)tag
+           oldLayoutMetrics:(facebook::react::LayoutMetrics)oldLayoutMetrics
+           newLayoutMetrics:(facebook::react::LayoutMetrics)newLayoutMetrics
+{
+  if (self = [super init]) {
+    _tag = tag;
+    _oldLayoutMetrics = oldLayoutMetrics;
+    _newLayoutMetrics = newLayoutMetrics;
+  }
+
+  return self;
+}
+
+- (void)executeWithRegistry:(RCTComponentViewRegistry *)registry
+{
+  UIView<RCTComponentViewProtocol> *componentView = [registry componentViewByTag:_tag];
+
+  [componentView updateLayoutMetrics:_newLayoutMetrics
+                    oldLayoutMetrics:_oldLayoutMetrics];
+}
+
+@end
diff --git a/React/Fabric/Mounting/MountItems/RCTUpdatePropsMountItem.h b/React/Fabric/Mounting/MountItems/RCTUpdatePropsMountItem.h
new file mode 100644
index 00000000000..efdfed64ddb
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTUpdatePropsMountItem.h
@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTMountItemProtocol.h>
+#import <React/RCTPrimitives.h>
+#import <fabric/core/Props.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Updates props of a component view.
+ */
+@interface RCTUpdatePropsMountItem : NSObject <RCTMountItemProtocol>
+
+- (instancetype)initWithTag:(ReactTag)tag
+                   oldProps:(facebook::react::SharedProps)oldProps
+                   newProps:(facebook::react::SharedProps)newProps;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/React/Fabric/Mounting/MountItems/RCTUpdatePropsMountItem.mm b/React/Fabric/Mounting/MountItems/RCTUpdatePropsMountItem.mm
new file mode 100644
index 00000000000..694b72e4046
--- /dev/null
+++ b/React/Fabric/Mounting/MountItems/RCTUpdatePropsMountItem.mm
@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTUpdatePropsMountItem.h"
+
+#import "RCTComponentViewRegistry.h"
+
+using namespace facebook::react;
+
+@implementation RCTUpdatePropsMountItem {
+  ReactTag _tag;
+  SharedProps _oldProps;
+  SharedProps _newProps;
+}
+
+- (instancetype)initWithTag:(ReactTag)tag
+                   oldProps:(SharedProps)oldProps
+                   newProps:(SharedProps)newProps
+{
+  if (self = [super init]) {
+    _tag = tag;
+    _oldProps = oldProps;
+    _newProps = newProps;
+  }
+
+  return self;
+}
+
+- (void)executeWithRegistry:(RCTComponentViewRegistry *)registry
+{
+  UIView<RCTComponentViewProtocol> *componentView = [registry componentViewByTag:_tag];
+  [componentView updateProps:_newProps oldProps:_oldProps];
+}
+
+@end