All leading camera brands have on SoC motion detection (Honeywell, Motorola...) and they have ML driven detection on their on premise stream servers. This is going to be a very tough sell.
They have lots of free applications in their App Gallery, and with minimal effort cheap Chinese cameras can be made to work with the system (since Axis OEMs their cameras from them anyway). https://www.axis.com/en-us/products/camera-applications/appl...
It seems like it should be straightforward to add, but I haven't had a chance to do so.
It's a tough space.. margins on these hardware devices are thin already, and sometimes negative as they are simply loss leaders hooking in users for long-term saas payments, so in our case, it's cheaper to build it in-house.
Good luck, however!