Yoda absolutely knows that Rey has the texts, it’s the whole reason he’s so cavalier about blowing up the tree. His actual line is “yes, yes, wisdom they held, but that library contained nothing that the girl Rey does not already possess”. He’s letting Luke think he means that Rey doesn’t need the books, but he’s actually saying she literally possesses them.
That’s fine, if a little “technical” on Yoda’s part. The problem is that the scene plays out clearly implying one thing, then the end of the movie has a very quick shot (which I have yet to perceive with my eyes; I’m trusting you guys that it really happened) which seems to imply the precise opposite. This film is littered with things like this, and with the example of the Yoda scene, I am still very uncertain what to make of it.
EDIT: This film intentionally sets out to antagonize people like me. I don’t exactly like that as an elected goal, but I can attempt to perceive and accept it for what it is trying to do. The fact that it jerks me around constantly and makes me feel like a monkey is another category of complaint.