Your NVR looks pretty open to the internet, all required ports are available, login screen is OK.
Pretty risky thing to do though with all the vulnerabilities.
What else do you have on the LAN the NVR sits on?
Sorry to be blunt, but you should do some searches on the forum about the risks of port forwarding your LAN to the internet and publishing the details including ports and IP address.
Nothing being blocked at all. That's what I'm trying to highlight.
Full access is available at the public IP address specified.
The screendump above is the actual NVR - over the internet.
And the RTSP port and the Hikvision media port also work.