Having a kickstand or third wheel deployed when battery voltage gets low, or perhaps just when the robot has been static for a while to save on power, does make

Having a kickstand or third wheel deployed when battery voltage gets low, or perhaps just when the robot has been static for a while to save on power, does make sense and if this is a separate piece of electronics then that's probably good enough as a safety system to prevent toppling. From a safety point of view as long as you've identified the possible hazards and done something which mitigates against them to some reasonable extent then that's probably good enough.