The entire field of process design & automatic process control. This literally is the O.G. job description of a chemical engineer. The field of grid design and balancing. Again job description of an electrical engineer.

Yes, but in all your examples it's the same: you learn the specific subject and you are implicitly learning "systems thinking"; it's not like you learn "systems thinking" first as the hard part, and then you learn electronic components as an implementation detail to become a electrical engineer.