Your photo would have been more convincing if it had the mirror and visualization in the same shot.
![Face with tears of joy :joy: 😂](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f602.png)
Or even split screen with the camera app, though I find it can be difficult gauging distance with the cameras.
And when you check your shoulder, you are looking away from what's in front of you. I prefer checking the screen (for camera or visualization) because there is not much transition between windshield and screen, as opposed to turning your head completely away from the road in front of you then back.