Yes, more likely she was taken, but a 3 year old can certainly get out of the house and “get away” pretty quickly in the right set of circumstances.
Oh I’ve already called it for Mommy’s boyfriend. Every 3 year old have ever met is afraid of the dark so really doubt she got up and just got in her Pink Barbie car and drove off.
I remember my 3-year old pushed out a window screen and climbed out. The neighbors brought him back. My wife freaked out!