It sounds like a gacha story tbh…
It's such a good manga
She thinks she's too wicked to become queen even though she's the rightful heir and she wants to leave her place to her sister
She has red hair... I know it's a black and white manga but I remember the illustrations
The art is great too
And I found it! After despairing and fumbling
It would have been hard for people to find it
https://www.mangago.zone/read-manga/higeki_no_genkyou_tonaru_saikyou_gedou_rasubosu_joou_wa_tami_no_tame_ni_tsukushimasu/
Could you find the name of the japanese manga where a girl who used to be a spoiled brat suddenly remembers her past life but because she's a princess who is supposed to awaken her powers to see the future, she pretends that's what happened, since in her past life she read the book of the life in which she is. She also has a butler that she treats well and a half sister who's supposed to be the protagonist. The first thing she does when she gets those memories, is to save her father from a carriage accident
And she saves a knight order that almost died in the mountains too...