Can I change the passage BookyAI wrote from my story before it goes into the chapter?

Yes, from version 1.9.19. On the preview, the chapter is shown with the new passage in place. Under it: "Shorter" and "Longer" write it again at another length, still only from what you said; "Different spot" goes back to the places; "Edit by hand" opens the passage as text, and whatever you change goes in exactly as you left it; "Tell more" returns to the conversation; "Write again" tries another version. "Keep my exact words" keeps your strongest sentences word for word. Move the mouse over a sentence to see the answer it came from; a sentence with a wavy amber line names a detail that is in none of your answers. Nothing is changed in the chapter until you press "Put it in my chapter".