It is fake noises. Change the modes and the sound changes per mode. Sport sounds different than eco. The engine sounds like a vacuum cleaner. There are turbo noises but I can assure you the difference you hear is fake
25 tremor on 30’s with a roof rack. I drive stop and go, hilly and short trip and hover around 18 to 19.5. In perspective my Vw golf only gets 20 doing the same. My tundra was 7.5 😬