The couple flagged the event from the United States, hours after many British Royal families gathered in Central London for the annual celebration at the Cenotaph war memorial.
The couple placed flowers the Duchess picked from their garden at the graves of two Commonwealth soldiers, one who served in the Royal Australian Air Force and one from the Royal Canadian Artillery, a couple spokesperson said.
Both Harry and Meghan wear poppies, symbols of remembrance in the UK and over much of the Commonwealth, while Harry also wears a military medal on his suit.
Meghan and Harry, who spent 10 years in the armed forces and on two tours to Afghanistan, want to be able to recognize Remembrance Day in their own way, their spokesperson added.
The Duke and Duchess also placed a wreath at a memorial in the cemetery that reads: “In tribute to the men who gave their lives to protect their country.”
The Duke signed a message with a wreath that read: “To all who have served, and are serving. Thank you.”
Harry also interviewed on the categorized military community podcast, saying “even when we can’t be together, we still remember each other.”
The spokesperson added that the couple removed the mask when alone or at a distance from others.
Meanwhile, in London on Sunday, Harry’s family, including his father, Prince Charles and his brother, Prince William, laid the wreath at Cenotaph. The event has been postponed due to Covid-19 restrictions.
The socially different event took place earlier with a two-minute silence and was observed by the Queen from the Foreign Office balcony.