LaView is Hikvision OEM, while Lorex is made by Dahua, so they are not natively compatible.
it can probably be made to work tho. I'd start with the cam(s) on your LAN (not the NVR's PoE side, if it has PoE) and make sure they have ONFIV compatiblilty enabled.
Then add the cams to your NVR as ONVIF devices.