NordVPN does not use wireguard, It uses Nordlynx (a proprietary version of wireguard exclusive to NordVPN). from what i understand it can be configured. You will first need to connect using a computer to a Nordlynx server. This allows you to get the credentials for public and private keys. Then create a custom VPN profile using them.
Here is a discussion or it:
FYI I did get it to work but would disconnect after a hour and I had to try 20 different servers to get the connection.