[Honestly, she wasn't really sure how it would work with a spirit like Raava. Wan Shi Tong was better to answer the question.

She knows about this, asked Korra all about it after Harmonic Convergence was over. Asked about the first Avatar and Raava and everything she'd seen. Jinora shakes her head.]

No, no humans live on the backs of Lion Turtles anymore. It's been over ten thousand years, Harmonic Convergence has come twice.