Rotor option for misspelled words in notes

I discovered a feature in iOs 11 in messages that there is a rotor option in the messages app called mispelled words. I cannot find this in the native notes app, though, so I wonder if there is a way to access that? I am an author and am writing a long book wich every note being a chapter and this would greatly enhance the spell checking experience. This is a good feature, but I don’t know how to use it. Wouldn’t this be better in the notes app than the messages app?