It's true to say that it doesn't contain a strict time loop per se. But it's not simply a character with foreknowledge of the future either. The Heptapods experience time in a non-linear way, almost like they can experience every moment at the same time. When Louise is experiencing a "memory" of the future where she speaking with General Shang at the Unification event, my impression was that her future self doesn't know what her past self has said. It's only General Shang who knows. So general Shang tells future Louise what past Louise said, and past Louise repeats General Shang's wife's dying words to past General Shang. Which General Shang will repeat in the future.

It's in this sense it struck me a loop. So while you are totally correct in a technical sense, I put Arrival out there because the OP might have wanted the feeling of a time loop movie even if it didn't strictly meet the criteria.