How to broadcast video from the car body on iphone to the salon?

Question

iPhone

There is a need to observe from the passenger seat what is happening in the trailer while driving. I don't know which solution is better to use. The camera should preferably be autonomous. Broadcasting to the iPhone is not required, it can be replaced by some screen (if you use a baby monitor). Budget, the smaller the better.
I thought about video baby monitors, but they are not autonomous, of course there is no wi-fi in the car, i.e. the image source must be directly connected to the iphone, perhaps it must create a wi-fi point.
Please suggest some devices that can help me.
I was already thinking about buying some simple smartphone on Andoid and fixing it) in the back as a signal source.
Thanks in advance for your advice!

Answer 1

Aliexpress has cameras for parking. Complete with screens are either screens broadcast on the rear-view mirror, or the mirror has a screen. Look there, prices vary.