I am in a UK address and getting many details out of which I am posting just these, posting others might be extraneous -
“Your IP addresses - WebRTC detection
DNS Address - 1 server, 1 errors.
If you are now connected to a VPN and between the detected DNS you see your ISP DNS, then your system is leaking DNS requests.”
Ergo, I believe I can safely rule out WebRTC Leaks.
Also, the page gives some details on how to switch off WebRTC for every browser. I don’t need to switch off my WebRTC, right? It’s necessary. NordVPN should be taking care of WebRTC leaks, unless I am mistaken.