Accelerate or overtake and energy consumption

Hello dear Tesla-drivers, I don’t drive an e-vehicle myself yet and would like to wait a bit, because there is no purchase of a new vehicle at the moment. Nevertheless, I have a little question of understanding and would like you to answer it briefly. Again and again I notice that not weary Tesla drivers avoid speeding up or driving a few km faster for a short time. I come to this now, because a few days ago as in the past also had One Tesla is more likely to have overtaken another vehicle with only a few km faster, so that the overtaking process took quite a long time. However, the StVO requires a quick overtaking, i.e. if the vehicle is driven at the same speed as the one to be overtaken, it must be accelerated and ideally overtaken at at at least 20 km/h higher speed. Well, some Tesla drivers don’t do this. So it must have an advantage, because otherwise they would do Is the energy consumption significantly higher when accelerated? Is the energy consumption really so much higher when 20 seconds to overtake the speed is increased by 20 km/h? I always thought that exactly this is not the case and a decisive advantage over a burner. When an electric vehicle is accelerated, hardly any energy is lost, because at the slower, almost all the energy needed to accelerate is returned to the battery. are I wrong about this?