Did Sophie from the BFG parent's die?

In Roald Dahl's "The BFG," Sophie is an orphan who lives in a children's home, implying that her parents are not present in her life. The story does not explicitly state what happened to her parents, but it suggests they are no longer in the picture, allowing her to live independently in the orphanage. The focus of the story is on her friendship with the Big Friendly Giant and their adventures together.