I looked at some older Zyxel products and came to the same conclusion a while back. There's a whole industry of labeling generic hardware as being part of someone's else ecosystem
https://www.hydrogen18.com/blog/hacking-zyxel-ip-cameras-pt-...
https://www.hydrogen18.com/blog/hacking-zyxel-ip-cameras-pt-...
it's a stretch to call it generic hardware, all of cheap cameras use similar hardware, but every few months there is a new version of chip which you need to adjust to. It's challenging to find an exact chip if you want to, because they get out of date faster than JS frameworks