I'm actually sad about this. In the future, Cheetah uses it too. Ling Lan also introduces it to her best playmates/childhood friends. It's such an inner circle thing. I wouldn't mind if the manhua took another chapter to explain this, or at least a good portion of a chapter, they didn't even name it this chapter. Maybe they actually slowly introduced the realized benefits as the novel did. I also believe, another commenters mentioned that her skill set now doesn't get much attention in the future. Like, the last time she used the Rabbit Kick was during her First Men's days, so much has happened in the novel