That’s the question at hand in the eighth episode of Preacher season 3.
However, TC reluctantly told Tulip that Featherstone was being sent to Hell with all of the souls they had stolen.
It seems that L’Angelle made a pact with Satan years ago to stay alive and young as long as she devoured souls.
In the last episode, Jesse made an alliance with his grandmother, Madame L’Angelle, and Herr Starr to restore his soul and regain his Word of God powers.