It is believed that Meghan will most likely stay back home with their two children, Prince Archie and Princess Lilibet. Andrew Lownie, author of the book "Traitor King: The Scandalous Exile of the Duke and Duchess of Windsor," spoke to The Express and mentioned that the reason behind Meghan's absence could be their son's fourth birthday, which falls on the same day as the ceremony.
Lownie also commented that not responding to the invitation would be considered rude, but it is expected that Harry will attend the event without Meghan, which may be part of the process of bringing him back into the royal fold.
Despite the expected absence of Meghan, the couple is expected to announce their decision regarding the coronation soon. An insider told The Times that the announcement could come sooner rather than later, particularly since President Biden has confirmed his attendance.