DS has never taken notes, full stop!
He has been typing for five years, but the only thing he typed was his answers.
Did he get taught so very differently from everyone else? Everything seemed to come on a pre-printed worksheet. Usually he worked with the worksheets as pdfs and he just inserted his answers on top. Sometimes they came printed out and he just drew on them. A typical activity on the pdfs was "connect the 6 questions in column A to the 6 jumbled up answers in column B". It was learning by soundbite and activity sheet.
For maths, there were no notes but he practiced examples with pen and paper.
For revising, DS really just relied upon the revision guides and yet more of those pdfs.
Is this not what happens in all your DCs schools too?