> Is it just me or is the screen not vertically centered on this device?

It's a 3D render. The actual display seems to be more or less centered[0].

> Also the wake up button is on the left instead of the right

One could presumably flip the device and the rotate the screen rendering by 180 degrees. This is how Apple Watch handles right wrist use.

[0]: https://pine64.com/wp-content/uploads/2020/09/PineTive-DevKi...