According to the search results, Suyin, Mei Yings mom, does not appear in Meg 2: The Trench, and the sequel reveals that her character died after the events of The Meg. The exact reason for Li Bingbings absence from the movie is not confirmed, but it is speculated that she may have been busy with other projects, including her work as a United Nations Goodwill Ambassador for China and her charity work. The movie does not provide specific details about Suyins death or what happened in the years between the two films.