I genuinely do hope they can find a way forward but suspect it may take a number of years - and perhaps with Harry on the fringes of the family for a while and seen to behave appropriately?
Yes, this is how I believe it will happen.
As I've said elsewhere, the RF drew a number of lessons from Diana. The hardest of which would be based on the media and public opinion, in those strange, fervid months after her death, that the RF had 'kicked her out' of the fold post divorce, isolated her, and that's why she ended up being driven by a drunk through a tunnel under the Seine.
The truth is more complex than that of course. But it' a perception that still remains.
Now, let's apply this perception framework to Harry. Multiple sources over the past two decades have been whispering that Harry is not a well man. He reputedly has better and worse periods, which is how these things tend to go, when they're chronic. It's volatile.
William is NOT going to want a situation where he's King and he's seen by the public to have played a similar role (of neglect and not caring) to that of which the Queen and Charles were accused in the late 90s, and which it took nearly 15 years for Charles to start to shake off.
The RF lives and dies by its long term public image. They don't directly make laws anymore; they don't lead us into battle, they don't take the cross and liberate Acre or triumph against the odds at Agincourt. It's all about the image. And the damage that would be caused by a Diana 2.0 would, I believe, be terminal for the kingship of William.
So, there will be a reconciliation. The hurt feelings, lack of trust, fear of embarrassment, fear of private convos leaking, etc etc can all be worked out. But Diana 2.0 would be impossible to work out. So, yes, the door will be cracked open for Harry eventually. He won't get as far as the drawing room - he might have to spend the rest of his life in the outer hallway - but, eventually, it'll happen. Trust and believe that the potential long term alternative is far, far less conducive to the survival of the House of Saxe-Coburg-Gotha.