I don’t think it is the mail making it up, it’s been taken from the Telegraph article when Harry spoke to them after the recent court hearing.
There would be nothing stopping him talking publicly about the experience and what he has learnt, putting together the pieces of the puzzle, writing a second book or making a podcast.
He will be acutely aware that to do so would cause further upset.
But the Duke believes that if he has uncovered an injustice, he should try and fix it