Aftermarket head unit and factory back up camera???

Does anybody know of an aftermarket head unit that will still work with the factory back up camera? I have a 2013 Prius III with what appears to be the middle level factory stereo. It does not work worth a darn with my iPhone and it's driving me nuts. I would like to replace it with one that would also let me keep using the steering wheel controls, but would give that up for better connectivity and usability.

Thanks,

Bryan