If the makeup of management doesn't reflect the underlying population, especially if non-management does, then yes of course that's a problem.

I as an ethnic German can echo the GP's point. Non-management can be quite diverse, but management is very much old, white, ethnic Germans as far as the eye can see.

There are still a lot of conscious/unconscious ethnic biases in Germany, especially among the older population.

Management is usually made of middle aged experienced people with really good speaking skills who have lived in the country for a decade or two at least. I suppose that the migrants in germany meet none of these criteria.

Management is actually usually made up of previous management’s social circles.

I suspect that is the only criteria migrants don’t really check, and that is the point.

> am I supposed to think it’s a problem that German companies are being managed by native Germans

Yes, you are supposed to think that now for some reason.

If by native you mean citizen, then there are also non-white natives of Germany. Without data on the ethnic makeup of the population it's difficult to say how poorly they're represented