[iOS] Fabric: Fixes Modal present splash when animation type is none

packages/react-native/ReactCommon/react/renderer/components/modal/ModalHostViewState.h

@@ -16,6 +16,10 @@
 #include <react/renderer/mapbuffer/MapBufferBuilder.h>
 #endif
 
+#if defined(__APPLE__) && TARGET_OS_IOS
+#include "ModalHostViewUtils.h"
+#endif
+
 namespace facebook::react {
 
 /*
@@ -25,7 +29,12 @@ class ModalHostViewState final {
  public:
   using Shared = std::shared_ptr<const ModalHostViewState>;
 
-  ModalHostViewState(){};
+#if defined(__APPLE__) && TARGET_OS_IOS
+  ModalHostViewState() : screenSize(RCTModalHostViewScreenSize()) {
+#else
+  ModalHostViewState(){
+#endif
+  };
   ModalHostViewState(Size screenSize_) : screenSize(screenSize_){};
 
 #ifdef ANDROID

packages/react-native/ReactCommon/react/renderer/components/modal/ModalHostViewUtils.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <react/renderer/core/graphicsConversions.h>
+
+namespace facebook::react {
+
+Size RCTModalHostViewScreenSize(void);
+
+} // namespace facebook::react

packages/react-native/ReactCommon/react/renderer/components/modal/ModalHostViewUtils.mm

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "ModalHostViewUtils.h"
+#import <Foundation/Foundation.h>
+#import <React/RCTUtils.h>
+
+namespace facebook::react {
+
+Size RCTModalHostViewScreenSize(void)
+{
+  CGSize screenSize = RCTScreenSize();
+  return {screenSize.width, screenSize.height};
+}
+
+} // namespace facebook::react