Yes Dahua makes Lorex, but keep in mind the Lorex all in a box kit is a very stripped down version of a Dahua camera and NVR with less than ideal MP/sensor ratios among other things, like bandwidth limited NVR and lesser quality. It is built cheap to sell cheap. And all fixed lens which usually won't cut it.
When we had a thief come thru here and get into a lot of cars, the police couldn't use one video or photo from anyone's system but mine. Not even my other neighbors Lorex $1,300 8MP system provided useful info - the cams just didn't cut it at night. His car was parked literally within 1 foot of the garage door and thus the cameras, so the perps where withing 8 feet of the camera and all he could tell the police is what time it happened....
His system wasn't even a year old and after that event has started replacing with cameras from
@EMPIRETECANDY here based on my recommendation and seeing my results. Andy's cameras were literally plug-n-play with the Lorex NVR. By the time we got inside, the cameras were already showing on his monitor. He is still shocked a 2MP camera performs better than his 4k cameras and he cannot figure out why- it is because his 8MP Lorex system was on the same size sensor as the 2MP so his cameras need over 4 times the light. Sensor size and optical zoom is more important than MP. Further mine could run in color and his could not.
Chase sensor size, not MP. Lorex will put 8MP on the sensor designed for a 2MP camera and then it will be useless at night.
Do a search here of Lorex and see how many people were disappointed with that purchase and started replacing within a year or so.
Keep in mind the only true "plug-n-play" systems are the true consumer grade stuff like Ring, Nest, etc., that doesn't allow you to change any parameters on the cameras - they are all set to the same thing.
Even if you went with the Lorex, you would be a fool to run it on default/auto settings - at that point, might as well just go with Ring or Arlo...
So you would have to go into each camera and set it up for your field of view and adjust shutter speed, gain, brightness, contrast, etc. and at that point, it is the same as BI....