Xcode iOS Simulator Build Fails: FirebaseCoreInternal.modulemap Not Found in React Native Project

I am building my React Native project and encountering a build failure on iOS simulators (targeting iOS 15.5), with the error indicating that FirebaseCoreInternal.modulemap is not found.

Note: The build succeeds only when using the “My Mac (Designed for iPhone)” option, which is a Mac Catalyst build.

What I've tried:

• Deleting Podfile.lock
• Running pod install (or pod install --repo-update)
• Testing on specific simulators (e.g., iPhone 13 Pro)

Below is my Podfile:

RUBYCopied
project 'app.xcodeproj'

# Resolve react_native_pods.rb with node to allow for hoisting
require Pod::Executable.execute_command("node", ["-p",
                                                 'require.resolve(
    "react-native/scripts/react_native_pods.rb",
    {paths: [process.argv[1]]},
  )', __dir__]).strip

platform :ios, '15.5'
prepare_react_native_project!

# If you are using a `react-native-flipper` your iOS build will fail when `NO_FLIPPER=1` is set.
# because `react-native-flipper` depends on (FlipperKit,...) that will be excluded
#
# To fix this you can also exclude `react-native-flipper` using a `react-native.config.js`
# ```js
# module.exports = {
#   dependencies: {
#     ...(process.env.NO_FLIPPER ? { 'react-native-flipper': { platforms: { ios: null } } } : {}),
# ```
flipper_config = ENV["NO_FLIPPER"] == "1" ? FlipperConfiguration.disabled : FlipperConfiguration.enabled

linkage = ENV["USE_FRAMEWORKS"]
if linkage != nil
  Pod::UI.puts "Configuring Pod with #{linkage}ally linked Frameworks".green
  use_frameworks! :linkage => :static
  $RNFirebaseAsStaticFramework = true
end

target "app" do
  config = use_native_modules!

  pod "Firebase", :modular_headers => true
  pod "FirebaseCoreInternal", :modular_headers => true
  pod "GoogleUtilities", :modular_headers => true
  pod "FirebaseCore", :modular_headers => true

  use_react_native!(
    :path => config[:reactNativePath],
    # Enables Flipper.
    #
    # Note that if you have use_frameworks! enabled, Flipper will not work and
    # you should disable the next line.
    # :flipper_configuration => flipper_config,
    # An absolute path to your application root.
    :app_path => "#{Pod::Config.instance.installation_root}/..",
  )

  target "appTests" do
    inherit! :complete
    # Pods for testing
  end

  post_install do |installer|
    # https://github.com/facebook/react-native/blob/main/packages/react-native/scripts/react_native_pods.rb#L197-L202
    react_native_post_install(
      installer,
      config[:reactNativePath],
      :mac_catalyst_enabled => false,
    )
  end
end

Also, here is my AppDelegate file:

OBJECTIVECopied
#import "AppDelegate.h"
#import <Firebase.h>
#import <IntercomModule.h> 

#import <React/RCTBundleURLProvider.h>

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  [FIRApp configure];
  self.moduleName = @"app";
  // You can add your custom initial props in the dictionary below.
  // They will be passed down to the ViewController used by React Native.
  self.initialProps = @{};
  [IntercomModule initialize:@"ios_sdk-" withAppId:@""];

  return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge
{
  return [self getBundleURL];
}

- (NSURL *)getBundleURL
{
#if DEBUG
  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index"];
#else
  return [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
#endif
}

@end

I am currently attempting to run the build on an iOS 15.5 target using the iPhone 13 Pro simulator. Any insights or suggestions to resolve the modulemap error would be appreciated.