Maybe W&K have realised that the only way to deal with toxic people is to not deal with them. Clearly Harry still thinks he is wronged and since nothing may convince him otherwise then excluding someone deluded like that is good for ones mental health. No contact, no meeting, no relationship. It's the best way mentally and emotionally to deal with histrionic, narc head melts and their body language, confidence and ease in the general public is obvious since Megxit. No longer having to continually and formally interact with the likes of Harry and Meghan is a relief. During that walkabout when the Queen died, for example, it was obvious who the bosses were and was a brilliant example of two people knowing it would be a one and done gig and they could soon go back to actively avoiding them for who knows how many years. I'd imagine watching the Sussexes fumble serves as a source of amusement for them as well as us.
They have their own family and interests. If Charles wants to mend things with Harry then maybe W&K have said they don't want a part of that and that if and when Charles wants to know his overseas grandkids then fire away but there is an understanding that the Wales grandchildren won't be part of that since it means getting involved with Harry and Meghan who will serve as good examples of toxic people from which the Wales grandchildren will themselves learn from i.e. recognise the traits, don't be like that, accept that not everything works out as you'd like etc.
Given that we are in a similar situation with our narc relatives, I agree.
Probably shouldn't be saying this given cultureeeee and all, but when my grandfather passed, there was the initial stress of now the narc uncle and his family will unleash fresh hell, and then the immediate problem of attending all the last rites (went better than expected, but they again showed their true colours). But then, even though we are legally still entangled with them and they've been popping up here and there to spoil our festive prayers etc, there is a huge sense of relief and lightness because we are very, very low contact with all of them. In Hindi when we talk about vengeful spirits or negative presences (or even alive negative people), we say "bura saaya" or "kaala saaya chhaya hua hai" - bad or black shadows surround the person. So this change is like light filtering in. Of course there are still black shadows, but the difference is stark. We've seen the same thing reflected in William and Catherine over the last couple of years. They're more relaxed and happier in spite of their grief over their grandparents and the stress of the drama created by the Harkles.
With time we have learnt to anticipate attacks around festivals or important days. Knowing that such a day is coming up fills us with dread because they can cause legal trouble, but we're slowly learning to take it in our strides. Mum still gets upset about how they've destroyed our relationships with and reputation amongst those we were supposedly close with, but she's also accepting now that they're just fairweather relatives who don't actually want us to have fair weather. If she, who had been groomed since birth, can more or less shut them out emotionally, Catherine and William definitely can.
Catherine might be sensitive but she clearly has a sense of boundaries and proper behaviour as well - people might take it as a negative trait but it's the best tool to have when dealing with such people who thrive on stomping boundaries. And she's fiercely protective of her family/team/those she is committed to. If she's anything like I suspect she is, she did all she could until a line was crossed and now she will not bend at all. William was also conditioned to always take care of Sparry, even help hide the bodies "for the good of the monarchy", but he would have realised that it would not help at all and could actually backfire on him if his involvement came to light later. Emotionally, they likely do still care about his well-being, but he won't be welcome to just waltz in and be a part of their core team, or even to be privy to anything important.
The biggest advantage that William and Catherine have is that they're in the position of power here. They have titles, money, goodwill, and most importantly, support of some sensible family, friends and teammates, and the ability to weather storms and survive and thrive on their own. The Harkles are surviving, but at what cost, and they're doing such unsavoury things, especially stealing from those who need help. Emotions aside, William and Catherine know that they and their babies are best away from that shitshow.
The Prince and Princess of Wales are done grieving those relationships and what should have been.
The Royal Rogue picked my suggestion for how the Harkles can make money & put it in his afternoon live stream!! 
🩷
.
Now, he's made an enemy of the media and pulled a runner. When they left, I thought, "There is nowhere on Earth they can hide he's lost & gone forever...
