UGH I LOVE THIS A LOT 😭 is there a novel for this?

The Novel:
https://www.novelupdates.com/series/the-most-heretical-last-boss-queen-who-will-become-the-source-of-tragedy-will-devote-herself-for-the-sake-of-the-people/

So far the translation is only at the Knights Arc, though (so it's at the same part as in the manga).

There's spoilers about the rest of the series, though. (Which I know because I've been sharing them.) Including scenes from later in the series.

Spoiler Master List:
https://forum.novelupdates.com/posts/5853854/