Hi,
It certainly should work.
I have two sites with IP CCTV, the second of which has a DS-7604NI-K1/4P which is brand new (upgraded to latest firmware V4.72.109 build 230107) and two DS-2CD2146G2-ISU cameras.
Even though the NVR has four PoE ports on the back, I don't use them. Instead, I connect the main ethernet port on the back the NVR directly to one of the non PoE port on the site's 8 port TP Link Gigabit EasySmart switch (it has 4 normal and 4 PoE ports). I needed a PoE port for a TP-Link EAP 225 WiFi access point and that needed to be on the main network.
I then configure the NVR with a static IP address in the same range (technically on the same subnet) as that used by the router. You can use DHCP just as well, I just prefer to have my CCTV stuff on fixed IPs.
This is from my DS-7604NI-K1/4P:
I never use "standard default" home type IP addresses as you can see LOL.
Nothing wrong with them though so for yours instead of 192.168.20.10 you would put in 192.168.1.170 (if you want to use .170 for the NVR) or simply leave DHCP ticked.
If you are going to use static (fixed) IP addresses, ideally you should modify the DHCP range (or pool) so that your static addresses are "outside" of that. So for yours you would want to set the router to issues DHCP addresses 192.168.1.2 - 192.168.1.169. Sometimes this appears in the router as a start address and a "range". So for the same thing you would use start address of 192.168.1.2 and a range of 167 (169-2).
Then add the cameras manually under IP channel:
All of the addresses in my pics are internal so no risk in them being "seen". You have to get past my firewall first.
One thing - HikVision cameras normally come preset with a fixed IP addresses. Have you changed those on the cameras and verified that you can connect directly to the cameras from a PC via a web browser on your local network first? Just to make sure you can talk to them on the IP address you want to.
One other thing I found - if you plug them in to the PoE ports on the NVR first and get them working via Plug & Play, it configures them for the NVR internal IP range. To get them working NOT plugged into the NVR - such plugged in to an external PoE switch like I use - it is best to do a factory reset on them. Otherwise they will sit there using the IP address the NVR gave to them and not talk to anything.
On new HikVision cameras the first two things I do are:
1. Install an appropriate spec microSD card (typically 128GB).
2. Login to their web interface and configure them either for DHCP or, if I know what address I want them to use, configure them for that.
What you are trying to do should and DOES work. You just need to find out what's going amiss.