No right answer
It's unresolved. That's the honest shape of it.
The Chinese Room isn't a puzzle with a solution waiting to be found. It's a question about what understanding actually is — and nobody has settled it. Philosophers, cognitive scientists, and AI researchers have been arguing about it for decades. It not feeling tidy is not a sign that you missed something.
What you can take from it: the question of whether a machine understands is harder than it first looks. That's enough.