I’d like to retcon that the keyboard appears flat on the desk cube.
Alternatively, I imagine the character struggling to type, sweating about being stuck in a box forever and frustrated by the lack of ergonomic typing options as they frantically try and communicate as fast as possible with the Proctor.
I think your claim that China and the US are the biggest markets due to being homogeneous is flawed. The United States is far from homogenous; in fact, it is on the way to becoming a minority majority country. This is quite different from China’s demographic makeup.