Since there is no actual 'Bridge to Terabithia 2', we can't really say it's a continuation. But if it were to be made, it would likely be a continuation, perhaps picking up where the first story left off, like exploring how Jess moves forward after Leslie's death.
There is no official 'Bridge to Terabithia 2' so we can't be sure. However, if it was a continuation, it could expand on the themes of friendship and loss from the first. It might show Jess trying to hold on to the magic of Terabithia while also dealing with the harsh reality of growing up without Leslie. It could also introduce new characters who help Jess on his journey of healing and self - discovery.
As it stands, there's no 'Bridge to Terabithia 2'. But in theory, for it to be a proper continuation, it should follow the growth of the characters from the first. Maybe it would explore how Terabithia, which was once a place of joy and escape for Jess and Leslie, could be transformed into something that helps Jess face his future. It could also delve deeper into the relationships Jess has with his family and how they change in the wake of Leslie's passing.