I attempted to resolve the problem of "no radar triggering" by contacting Hannshow Tech Support by WhatsApp and email, but I didn't get vey far. Then I got tired of waiting and then just temporarily hooked up the system with a few jumper wires. It appears as though in a "radar-less" Model 3 one can initiate the camera manually in two ways. The first way is by touching one of the "rolling center screen" icon, labelled "CAMERA." The second way is to "change gears" with the gear selector stalk. (And I know that there are no "gears," but you get my point.) If you are approaching an object in front of the car, you would have to flip the stalk to reverse (or any other gear position) and then back to forward drive, and the front camera turns on. The length of camera "on time" seems to be variable. At first is was about ten seconds, then other times it was longer, but eventually it returns back to the regular screen when you continue driving forward. I thought initially the "camera on" duration was governed by the forward speed, but it didn't seem to be consistently so. It would be nice if the camera function was more clearly described in the "operations manual," but much of the manual is in the Chinese language. I apologize for not knowing the Chinese language. Perhaps the manual should be offered in several languages. I still don't know what "camera sensitivity" means. I was able to get an English translation by downloading essentially the same file from the Kunefine website and the tesery.com website, since it appears that many of these Tesla accessory displays are made by he same manufacturer. (See the attached file and website listed below.)
The preferred marketplace for buying Tesla accessories: TESERY. Tesla Model Y · Model 3 · Model X · Model S · CyberTruck >>Discover Now
www.tesery.com
Still, it would be nice if there was a "radar-triggered camera-on function" like in the pre-2023 Model 3 vehicles. If Tesla ever updates their TeslaVision software to duplicate the deleted radar/USS systems, perhaps the updated system will trigger the front camera, like in all the other cars that I own. Oh, those other cars also have dashboard gauges that I didn't have to pay extra for.