when you use Dahua NVR and cams, NVR talks with cams using "Dahua private protocol"...
the same are using Dahua apps (DMSS, Smart PSS) - they connect with cams/nvr using Dahua private protocol.
over this protocol you have all functionality (all AI functions, ability to configure cameras/NVR etc).
when you mix different manufacturers in NVR and cams you must use universal ONVIF.
Over ONVIF usually works only video stream and nothing more...
No AI, no motion detection, no remote configuration, no 2-way talkback, no lights actions etc..
the same situation is in Dahua, HIK,
Uniview or any other brand.
So always you must choose one manufacturer - and stay in his ecosystem to have full functionality and have ability to use his apps.
if you want to use Luminsys gear - stay fully in this ecosystem and don't mix with Dahua..