Long story short: I haven't allowed Geekbench 4 to access the camera, which means that the application shouldn't be able to use the camera. However, in the benchmark result a category named 'Camera', with the unit 'images/sec', caught my eye.
Since Geekbench 4 is available on the App Store, I doubt that they're using any method to bypass system permissions. The only realistic possibility I see is that this is somehow simulated, but this begs the question: is there a way to accurately simulate this metric without actually using the camera?
Screenshot for reference: