The brothers last saw each other at Queen Elizabeth II’s funeral in September 2022.
According to a royal commentator, Prince William “won’t be shedding a tear” over Harry’s absence.
WATCH NOW: GB News discusses reports that Sussexes would be happy to attend Christmas with royals
Jennie Bond said: “Harry’s absence from the celebrations at Sandringham will be painfully obvious.
"Little Archie and Lilibet should be running around with their many cousins, pulling crackers, opening presents and understanding their place in the family, connecting with their relatives even though their lives are thousands of miles away.
"But that’s not going to happen.
"I don’t think William will be shedding a tear over this.
The Royal Family traditionally travel to Sandringham for Christmas
"Deep down, I’m sure he still loves Harry, but I don’t think he can see a way out of the rift that has opened between them.”
The royal commentator also told The Sun: “William is thriving on his own.
"He is fiercely facing forward with his life, he’s forging ahead with his causes and preaching hope and optimism about projects to save the planet.
"He is shining on the world stage and, in truth, he’s probably quite happy not to share it with Harry.
Harry and Meghan last spent a Christmas with the royals in 2018
“I think William has closed his mind to the prospect of reconciliation with Harry, and I can’t see a time when Meghan would be welcomed back into the bosom of the family - or a time when she would ever want to be welcomed back.
“I doubt that William thinks about them for more than a fleeting moment - and then he probably tries to blank out those thoughts.”
Prince Harry and Meghan Markle moved to California in 2020, where they live near the Duchess of Sussex's mother Doria Ragland.
The Sussexes have spent the last four Christmases over in the United States, including in 2019 when they were still working members of the Royal Family.