I Have to Come Clean: I'm an All-Powerful Big Shot

[No-romance power fantasy with a female lead]

Yan Qingyu, the young sect master of the Qingyun Sect, has been extraordinarily gifted since childhood. She instantly understands laws that others can’t comprehend, and even casually guiding someone through pill refining produces top-grade pills. Sadly, fate is jealous of genius. For all her talents, she has nothing but a head full of knowledge and a pitifully useless spiritual root...

So, despite being utterly helpless in a fight, she dies young and transmigrates to an unfamiliar era, becoming a useless biological heiress...

Tentatively no romance. The heroine shines on her own!