My school didn’t weight grades and didn’t name a valedictorian. At the time I was annoyed, since it felt like it mad my full-IB 4.0 less meaningful. It didn’t. It meant that there wasn’t a cut-throat attitude in my IB classes, which in retrospect I appreciate. There were some state-sponsored scholarships that went to the top 3 students in the graduating class, where they used ACT scores as a tie-breaker. I knew that I was graduating top of my class, and so did my guidance counselor and teachers. They can say that in their letters of recommendation.
And honestly, unless it’s needed for a scholarship, after you graduate no one is going to care if you were valedictorian.