I don't know of any. You could get a mirror or a Varia radar to assist you with traffic behind you. They do have Varia's, lights and other rearward looking devices with cameras built into them. But mostly for incident recording that can only be reviewed after the fact. Not while actually on the bike riding.

I just go by the idea that I don't really need to know what's behind me. At least not until I am about to change lanes or turn. Then I just turn around and look. It's worked well for me riding in the road with motor vehicle traffic for over 60 years. I do have a Varia radar now that I've had for the last 5 years. But only as a 2nd check of what I see when I turn my head. I've never used a mirror on a bike. But if that is reassuring to you, then use one.

For the most part, I just firmly believe that if a motor vehicle does intend to harm me, I'm not going to be able to know that in time to avoid it. Regardless of whether I have a mirror, radar, or video camera with live time monitor for me to watch.