I know you are an apprentice and it is great that you are seeking help and trying to understand what you see. I just don't understand why on post 17 you are asking the same question again which has been answered many times thru this thread. I hope you have finally gotten an answer.
I will add one more anecdote..........The grounding electrode conductor does not ever need to go to any subpanel within the same building. You can have 10 subpanels and the grounding electrode conductor only needs to be installed at one location at the service.