Laurel is in the AU!Hero world. She was bord with the sonic scream, there's no Sara in her world, she was the only child of Quentin Lance, was a police officer, while her mother (also named Dinah) which is why she does by Laurel, was the original Black Canary. Laurel was raised to always do the right thing, she was born with a sonic scream, and when she got older her father stop being a cop and started to be a PI, Dinah followed in his footsteps and then moonlighted as the Black Canary, letting her mother retire.