2015 Honda Odyssey - Why won't door switch work?

Driver-side rear button won’t open the sliding door, but closes it OK. Driver’s
control buttons work OK, opening/closing the sliding door. Also can manually
open the door by pulling on door handle OK.
The passenger-side controls work OK, can open/close passenger-side sliding
door using any control, problem only on driver-side sliding door.

First, Do you have a question? You didn’t ask one.

I’d suggest that if you’d like the drivers sliding door to open when the button is pressed that you first check to see that there is not a “child switch” activated that prevents this. That info is in your owners manual. If that has not been activated, the drivers side sliding door switch has likely failed.