There was a very old ThinkPad design that allowed the keyboard to take more space than the width of the laptop, but that was also bad old non-split layout

But at least not wasting existing left/ right side space and having a gap in the middle instead would be a nice start

Or maybe even get to the best of the portable/non-portable worlds: since the keyboard is wireless, you could detach 2 halves of the keyboard and place them on a desk at ergonomic shoulder distance

And this would allow you to also ergonomically position the laptop itself for a better screen position - vertical, just like your desktop monitor

ThinkPad: https://youtu.be/RRHFi_l9UR0