One such change was the opening of their own Instagram account.
The couple have 8.7 million followers on the platform, @sussexroyal.
They use it to update followers on their lives and their charity projects.
The most recent post is a sweet snap of Archie in Prince Harry’s arms, celebrating his first Father’s Day.
The couple have also used the account to congratulate other royals on their birthdays. On the Queen’s birthday they wrote: “Happy Birthday Your Majesty, Ma’am, Granny. Wishing you the most wonderful day.”
For Prince Philips birthday they wrote a similar message: “Wishing His Royal Highness The Duke of Edinburgh, Sir, Grandpa a very Happy 98th Birthday!”
However, eagle-eyed fans noticed the couple did not post a special message for Prince William’s birthday last week.
A royal expert has blasted the move, calling it “pretty rude”.
The editor in chief at Majesty Magazine Ingrid Seward said: “I think it’s a snub if they don’t leave one for Prince William as they did for the Duke and for the Queen.”
She told Sun Online: “If they don’t I think it’s pretty rude and will certainly be construed as purposeful.
“That is the trouble with Instagram, it becomes your slave.
“But it’s not as if it’s a cousin or a friend – it’s Harry’s big brother.”
Prince William and Harry have split in a number of ways in the last year.
The Duke and Duchess of Sussex are leaving the Royal Foundation to set up a charity of their own.
The Royal Foundation told Mirror Online: “We announced earlier this year that the Royal Foundation was reviewing its structures in order to best support Their Royal Highnesses in their future roles and their new households.
“Any announcement regarding the outcome of this review will be made in due course.”
A further statement said: “The Duke and Duchess of Sussex will establish their own new charitable foundation with transitional operating support from The Royal Foundation.
“In addition both couples will continue to work together on projects in the future, including on The Foundation’s mental health programme, Heads Together.
“These changes are designed to best complement the work and responsibilities of Their Royal Highnesses as they prepare for their future roles, and to better align their charitable activity with their new households.”