The reason for speculation this time is due to a photo taken during the Remembrance Festival at Royal Albert Hall. Prince Harry and Meghan were placed on the delicate plate and it shows how Meghan wears a dress that extends slightly over her waist.
Meghan managed to hide her first pregnancy well. So she always wore the right dresses and jackets to hide her growing belly. That's why fans now pay attention to her clothes and attitude.
The picture below also shows Meghan putting his hand on his stomach.