@JelloYello all her knowledge comes from her life in this world though, from time-travelling back to her childhood after having worked very hard to gain the knowledge and skills and then dying.
Literally none of that comes from her having memories of a past life as a person from a modern first-world country with an entirely different culture.
Her character and knowledge and personal identity is centered around her life as a member of the Lombardy family.
I don't think any of this is bad in itself and as I've said before, I like this story.
This is an author-level, not character-level gripe for me because it's something that I've encountered pretty often now and am rather frustrated by. When I pick up an isekai story to read, I do so because I want to read a story where it's a relevant and important part of the plot.