Disable 'Invisibility on LAN' - NordVPN Linux

Registered here just to answer this question. Long time lurker.

I had the same problem. There is no flag/option for the "invisibility on LAN" feature, however, you can whitelist your entire subnet or a range of it and it effectively fixes the issue.

In my case, I implemented:

nordvpn whitelist add subnet 192.168.1.0/24

This immediately opened up my LAN with NordVPN enabled.