Exporting NavMesh

Hey guys,
already asked in the forums: Problem with exporting nav mesh data. - C++ - Unreal Engine Forums
i’m using following code to export the Navmesh:

    FWorldContext Context = GEngine->GetWorldContexts().Last();
        UWorld* World = GetWorld();
        UNavigationSystemV1* NavSys = FNavigationSystem::GetCurrent<UNavigationSystemV1>(World);
        ANavigationData* NavData = NavSys->GetDefaultNavDataInstance(FNavigationSystem::ECreateIfEmpty::DontCreate);
        ARecastNavMesh* NavMesh = Cast<ARecastNavMesh>(NavData);
        NavMesh->GetGenerator()->ExportNavigationData(FString(TEXT("C:\\Users\\xxxx\\Navmesh")));

Somehow not the Navmesh gets exported, but a model what looks like the a collision model.
But i would like to extract the NavMesh itself (for using it in VR to highlight, where a player can go)

model exported

model (orange) i would like to extract

Would be great if someone could point me in the right direction. I’m also unable to find the Definition of ExportNavigationData()

kind regards

i’m in the same boat bro, i hope someone enlights us