In DC Comics, Harley Quinn doesn't have a daughter in the main continuity. Maybe in some alternate universe or spin-off? However, there's a character named Ivy in some stories, but that's not a daughter. So perhaps this is a fan-created scenario.
The phrase "old enough" often surfaces in fan communities regarding the maturity or developmental milestones of these characters: Character Maturity : Discussions frequently center on whether characters like Lucy Quinzel harley sin lil daughter is old enough
The phrase "is old enough" typically refers to the popular trope in the Batman franchise known as the (rapid aging) or the specific comic runs where Helena grows up to become a hero. In DC Comics, Harley Quinn doesn't have a
Jax grinned, a flash of her mother’s reckless spirit lighting up her face. She hopped on, kicked the starter with practiced force, and the Ironhead screamed to life. With a snap of her visor and a cloud of dust, Jax tore onto the highway. So perhaps this is a fan-created scenario
When Harley Quinn first appeared on the scene, she was depicted as a young, impressionable psychiatrist named Dr. Harleen Quinzel who fell in love with the Joker. He manipulated her into helping him with his crimes, and she eventually became his loyal sidekick. This dynamic was central to her character, and her love for the Joker was portrayed as an all-consuming force in her life.