re your hikvision nvr, using the IP Cam manual add function, did you select HIk Protocol? I don't know if this works or not BUT i was trying to get to where you are but after connecting the cam to wifi at home for testing never managed to connect to pro level WAPs and client Hik NVR, then...
Installed one of these 4K 2nd Gen ColorVu AcuSense 8MP 4mm (DS-2CD2T87G2-L) this year for a client, to monitor a large area and long driveway to a farm, the picture in low light is amazing, the line crossing & intrusion detection are also excellent no nightmare with the usual false alarms like...