Can I chunk c++ files?

I want to chunk my game into files so that future game patches will be small. I can chunk assets in the content folder ok, but I cant chunk c++ classes.

The example at Preparing Assets for Chunking | Unreal Engine Documentation doesnt mention c++ classes.

If I use the “explicit Assets” section I can assign c++ classes to a chunk

and the audit assets window shows the chunk exists

However upon packaging the game, the chunk file for the c++ classes does not exist in the game files.

Does anyone know how to chunk c++ files? Or maybe somone knows of a different way to make game-patches small?