That labor costs are rising and are now significantly above poorer countries like Bangladesh or Myanmar doesn't mean they're anywhere near high-income countries or above the cost of automation for low-volume tasks like last-mile delivery, which drivers do for under a dollar per trip: https://archive.ph/SizjZ
Automation can make sense even with low labor costs if it enables higher volume. Like nobody is paying humans to chisel individual screws by hand, because machines can do it quicker and better, and therefore cheaper.
But you can't substantially increase the volume of last-mile delivery by replacing the human with a robot, because the robot would have to move faster, and moving faster would be dangerous. So robotic automation of low-volume tasks can be expected to happen in high-income countries first.
Automation can make sense even with low labor costs if it enables higher volume. Like nobody is paying humans to chisel individual screws by hand, because machines can do it quicker and better, and therefore cheaper.
But you can't substantially increase the volume of last-mile delivery by replacing the human with a robot, because the robot would have to move faster, and moving faster would be dangerous. So robotic automation of low-volume tasks can be expected to happen in high-income countries first.