Meghan Markle decided to cut ties with the UK due to a huge rift between the Sussexes and the Royal Family, according to a royal commentator.
The Duchess of Sussex chose not to attend Prince Harry's Invictus event earlier this month.
The King's youngest son gave a reading at St Paul's Cathedral at an event to mark the 10th anniversary of the Invictus Games.
Harry founded the Invictus Games in 2014 when he was still a working member of the Royal Family.
The Duchess of Sussex chose not to attend Prince Harry's Invictus event earlier this month.
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No members of the monarchy attended the event at St Paul's Cathedral.
Royal commentator Richard Fitzwilliams told GB News that Meghan chose to stay away from the UK due to her poor approval rating and the rift between the Sussexes and the Royal Family.
Fizwilliams said: "It was not a question of supporting him [Harry], she [Meghan] was not coming here because her ratings in the polls are terrible.
"The Royal Family has this huge rift, so there are all sorts of reasons why she chose to stay away.
No members of the monarchy attended the event at St Paul's Cathedral.
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"She assumed which turned out to be the case that she would get positive publicity in Nigeria.
"It made total sense not to accompany Harry to St Paul's Cathedral, it would have been unthinkable a few years ago that this would happen but it has."
Despite not joining Harry at the Invictus event, Meghan did fly to Heathrow Airport to meet her husband before the couple travelled together to Nigeria for a three-day tour of the Commonwealth country.
The tour was widely seen as successful and the Sussexes received praise for championing mental health awareness during multiple engagements in Nigeria.
Fitzwilliams told GB News that the tour propelled the couple into an "A-lister bracket".
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Fitzwilliams told GB News that the tour propelled the couple into an "A-lister bracket".
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He said: "I think they will be very satisfied with it because it was a private visit that had all the trappings of a royal visit.
"So in reality, people conflated the two, and it had enormous press coverage.
"They had huge international coverage so what this gives them is an opportunity to build the value of their brand internationally by doing this again.
"Now that they have beefed up their communication team, I would expect them to do this again.
"This puts them much more into the A-lister bracket. What they had done before was not that much or that impressive."