When you use NordLynx, NordVPN installs some virtual network components so that it works when you’re connected to the VPN servers. If you hover over your WiFi status and it reads “NordLynx — no internet access” it’s because the components are available but not connected to the internet — and they shouldn’t be if you’re not connected to NordVPN. When you see this, you’ll still be able to connect to the internet.
Some users have also reported a different issue, which is that their internet connection attempts to route through NordLynx (and subsequently can’t connect at all). If this happens, I recommend disconnecting from your router and restarting it. Make sure that your NordVPN app is up-to-date as well.