[iOS] Receiving message "Codegen didn't run for XXX", but it did + string prop is always ""

[CptFabulouso]

For the following I will stick to naming convention:
Lib - the library itself
Project - the expo project using the Lib

I've created a lib (can't link, it's private repo) and when I use this lib in expo project I keep getting warning message in console "Codegen didn't run for XXX", while it seems everything is generated. During development of the lib (using bob-builder) I don't receive such messages. Files are generated in the expo project (prebuild opened in xCode).
And I don't know if it's related (but I am not able to spot any other issue) but in one of the js specs I have a string value as a component prop, but in the expo project, whatever I set the value to be, ios native code always receives empty string ("") value. It's not a problem during the Lib development. the spec file:

export interface NativeProps extends ViewProps {
  color?: string; // tried different prop name, same issue
}

export default codegenNativeComponent<NativeProps>(
  'MapComponent'
) as HostComponent<NativeProps>;

The lib's package.json contains:

"codegenConfig": {
    "name": "RNMapsSpec",
    "type": "all",
    "jsSrcsDir": "./src",
    "outputDir": {
      "ios": "ios/generated",
      "android": "android/generated"
    },
    "android": {
      "javaPackageName": "com.maps.specs"
    }
  }

This means the codegen should run on the project, because I do not have the includesGeneratedCode field, right?
If I take some example component in the Lib with lines:

- (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &)oldProps
{
  const auto &newProps = *std::static_pointer_cast<ComponentProps const>(props);

then when in the expo project under "Development Pods" I open the reference to ComponentProps I get to .../ios/build/generated/ios/react/renderer/components/RNMapsSpec with all the generated values - that's the codegen generated stuff, right?

If I make change in the node_modules by adding some value into the js spec file and run pod install, this file is correctly updated. So why do I keep getting the message? I also see this line during the pod install:

[Codegen] Generating Native Code for RNMapsSpec - ios

Running on

"react-native": "0.76.7",

I made sure the Lib's example project uses same version. I've also added an expo example project into the lib. All is fine in the lib example projects.