diff --git a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h
index f6a35caf3f0cb3..2c8ce3fa363669 100644
--- a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h
+++ b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h
@@ -11,6 +11,7 @@
 @class RCTBridge;
 @protocol RCTBridgeDelegate;
 @protocol RCTComponentViewProtocol;
+@class RCTRootView;
 @class RCTSurfacePresenterBridgeAdapter;
 
 /**
@@ -86,6 +87,26 @@
 - (UIView *)createRootViewWithBridge:(RCTBridge *)bridge
                           moduleName:(NSString *)moduleName
                            initProps:(NSDictionary *)initProps;
+/**
+ * This method can be used to customize the rootView that is passed to React Native.
+ * A typical example is to override this method in the AppDelegate to change the background color.
+ * To achieve this, add in your `AppDelegate.mm`:
+ * ```
+ * - (void)customizeRootView:(RCTRootView *)rootView
+ * {
+ *   rootView.backgroundColor = [UIColor colorWithDynamicProvider:^UIColor *(UITraitCollection *traitCollection) {
+ *     if ([traitCollection userInterfaceStyle] == UIUserInterfaceStyleDark) {
+ *       return [UIColor blackColor];
+ *     } else {
+ *       return [UIColor whiteColor];
+ *     }
+ *   }];
+ * }
+ * ```
+ *
+ * @parameter: rootView - The root view to customize.
+ */
+- (void)customizeRootView:(RCTRootView *)rootView;
 
 /**
  * It creates the RootViewController.
diff --git a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
index 65c48ff28d2290..4cecb740a3f23a 100644
--- a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
+++ b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
@@ -7,6 +7,7 @@
 
 #import "RCTAppDelegate.h"
 #import <React/RCTCxxBridgeDelegate.h>
+#import <React/RCTLog.h>
 #import <React/RCTRootView.h>
 #import <React/RCTSurfacePresenterBridgeAdapter.h>
 #import <react/renderer/runtimescheduler/RuntimeScheduler.h>
@@ -117,6 +118,7 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
     }
     rootView = [self createRootViewWithBridge:self.bridge moduleName:self.moduleName initProps:initProps];
   }
+  [self customizeRootView:(RCTRootView *)rootView];
   self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
   UIViewController *rootViewController = [self createRootViewController];
   [self setRootView:rootView toRootViewController:rootViewController];
@@ -144,10 +146,16 @@ - (RCTBridge *)createBridgeWithDelegate:(id<RCTBridgeDelegate>)delegate launchOp
   return [[RCTBridge alloc] initWithDelegate:delegate launchOptions:launchOptions];
 }
 
+- (void)customizeRootView:(RCTRootView *)rootView
+{
+  // Override point for customization after application launch.
+}
+
 - (UIView *)createRootViewWithBridge:(RCTBridge *)bridge
                           moduleName:(NSString *)moduleName
                            initProps:(NSDictionary *)initProps
 {
+  [self _logWarnIfCreateRootViewWithBridgeIsOverridden];
   BOOL enableFabric = self.fabricEnabled;
   UIView *rootView = RCTAppSetupDefaultRootView(bridge, moduleName, initProps, enableFabric);
 
@@ -156,6 +164,21 @@ - (UIView *)createRootViewWithBridge:(RCTBridge *)bridge
   return rootView;
 }
 
+// TODO T173939093 - Remove _logWarnIfCreateRootViewWithBridgeIsOverridden after 0.74 is cut
+- (void)_logWarnIfCreateRootViewWithBridgeIsOverridden
+{
+  SEL selector = @selector(createRootViewWithBridge:moduleName:initProps:);
+  IMP baseClassImp = method_getImplementation(class_getInstanceMethod([RCTAppDelegate class], selector));
+  IMP currentClassImp = method_getImplementation(class_getInstanceMethod([self class], selector));
+  if (currentClassImp != baseClassImp) {
+    NSString *warnMessage =
+        @"If you are using the `createRootViewWithBridge` to customize the root view appearence,"
+         "for example to set the backgroundColor, please migrate to `customiseView` method.\n"
+         "The `createRootViewWithBridge` method is not invoked in bridgeless.";
+    RCTLogWarn(@"%@", warnMessage);
+  }
+}
+
 - (UIViewController *)createRootViewController
 {
   return [UIViewController new];