They support ONVIF now in their backend.

The "UniFi Protect" NVR server can ingest a feed from a 3rd party ONVIF camera, but I don't believe Ubiquiti's own cameras can expose themselves over ONVIF. Their camera's still seemed locked to their NVR software. (Though they do have a very basic managment interface hosted on themselves, and you can ssh into them)

Ubiquiti NVR does not support ONVIF on-camera detected motion events.

truth, didn't mean to imply otherwise.

> They support ONVIF now in their backend.

Got a link? I'm curious about which profile(s) and does this mean that it's still proprietary between the NVR and camera but from the NVR I can get an onvif profile compatible feed?

You can bring ONVIF compatible camera into NVR, but you won't get any detections unless you use AI Key...