I don't know how accurate the letter from Queen Mary is in The Crown tv series but it contains an essential truth that Harry needs to grasp, well should have understood years ago but it's Harry. There is his fond, I'm assuming slightly soft, parent, and there is the King. In matters of State, in times when Harry insists he is a working royal still, when he talks about briefing the media about his activities, when he attacks the Justice system, when he wades into politics, that is the point when the fond father gives way to the King.
We needed the monarch, and the establishment, to draw a clear line and they did. I'm pretty sure that Andy Burnham was part of the discussion and is probably far less sympathetic to Sussex stunts than Kier Starmer would be. They do need to update the Royal website, and the palace needs to understand why that's important too.
Harry and Meghan wanted to be private citizens, to make money and do their own thing. They've got what they wanted. Harry is now no more part of the monarchy than Princess Andre. It's because he keeps trying to insist on his status that it has now been made clear that it exists only in his head.