I would like tp have this “option” on my next new car. There is no shortage of idiots that will pull out/walk behind a backing up car.
There are backup cameras available as an aftermarket add-on.
I bought my wife a portable, color camera to help her in hooking up her trailer. The trailer is bumper mount and the camera magnetically attaches to the tail gate above the hook. It has a small little monitor my wife can hold in her hand and even automatically reverses the image in the display. Also comes with a night setting to operate in low light. Because it is magnetic she can mount the camera inside her horse trailer and keep an eye on her horse as she is driving. Cost about $150. Because it is handheld it also has unlimited usage, especially inside the house.