I think it is because his parents and five brothers are buried there.
pip was near his brother,mother and father
at the churchyard
Pip's benefactor, Magwitch, carried a file and food when Pip met him in the churchyard. The file was for escaping from the prison ship and the food was for sustenance during his escape.
A terrified Pip instantly leaves the churchyard and returns home to Joe and Mrs. Joe. During the night, he sneaks down to the kitchen and steals food and brandy to give to the convict Magwitch/Provis.
Pumblechook treats Pip with disdain and condescension before his visit to Satis House. He belittles Pip and makes him feel inferior and unworthy.
Joe wrote a letter to Pip announcing his visit to London.
When the story opens, Pip is visiting the graves of his parents and siblings in the village churchyard. He is feeling alone and vulnerable in the graveyard, which sets the tone for the gloomy and haunting atmosphere of the opening scene in Charles Dickens' novel "Great Expectations".
pip says biddy has hurt him because she doesn't believe him when he says he will visit more often
Miss Havisham and Estella were too busy to visit with Pip.
Estella was studying abroad[:
Joe agrees to let Pip visit Satis House when Miss Havisham requests his presence. However, he believes that Pip should stay away from there because he fears it may be influencing Pip negatively, leading him to forget his humble roots and become ashamed of his family and upbringing. Joe wants to protect Pip from these negative influences.
Thomas Churchyard died in 1604.