Use a legacy native module binding that always returns null in bridge…

…less mode (microsoft#13905)

* Use a legacy native module binding that always returns null in bridgeless mode

* Change files

* format

change/react-native-windows-40511e3c-feb7-429f-9b7f-22d0ba2f9dc1.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Use a legacy native module binding that always returns null in bridgeless mode",
+  "packageName": "react-native-windows",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/ReactHost/ReactInstanceWin.cpp

@@ -680,8 +680,16 @@ void ReactInstanceWin::InitializeBridgeless() noexcept {
                 return turboModuleManager->getModule(name);
               };
 
+              // Use a legacy native module binding that always returns null
+              // This means that calls to NativeModules.XXX will always return null, rather than crashing on access
+              auto legacyNativeModuleBinding =
+                  [](const std::string & /*name*/) -> std::shared_ptr<facebook::react::TurboModule> { return nullptr; };
+
               facebook::react::TurboModuleBinding::install(
-                  runtime, std::function(binding), nullptr, m_options.TurboModuleProvider->LongLivedObjectCollection());
+                  runtime,
+                  std::function(binding),
+                  std::function(legacyNativeModuleBinding),
+                  m_options.TurboModuleProvider->LongLivedObjectCollection());
 
               auto componentDescriptorRegistry =
                   Microsoft::ReactNative::WindowsComponentDescriptorRegistry::FromProperties(