To be run/rushed off one's feet

A: "How's Jane's new job?"

B: "She said that she was being run/rushed off her feet in her new job,
and that she wished she'd never left her old one."

Is the idiom (to be run/rushed off one's feet) passive voice? I wonder why if it is real a passive?

Thanks

Note:
(present/past progressive passive voice)

to be run/rushed off one's feet - to keep someone very busy by continuous work