TBH my heart broke a little today. I can't imagine a world where Harry circa 2015 and earlier would miss his beloved grandfather's service of thanksgiving. The man who protected him in Balmoral when Princess Diana died, who walked behind his mother's coffin with him... Who, from the accounts of all his grandchildren, was an amazing, loving grandfather with a wicked sense of humor.
Harry should've been there. Meghan should've been there too, but I don't think we'll see her in the UK ever again, she already said her goodbyes. But I think with time, Harry will realize what he did, and it will be one of the most painful memories of his life - though it will be too late at that point to fix his mistake. And if he doesn't, well, then I'll think he's truly too far gone for his relationship with his family recover in the future.
Bingo!! You have hit the mail on the head.