Help with Orthographic rotation

I have seen this playground example.

In my scenario,
I have ‘n’ objects in the scene. Each object is translated from world origin.
I need to rotate the objects.
But when I use the above method, all the objects are rotating separately. It doesnt rotate as a whole.

Did I miss something here?

In order to get the most help please provide a simple PG (playground) with a few objects and code to show your problem.

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