I picked up my new NX yesterday and I have the exact same issue and behaviour in the App, unknown status, no trips etc.
When I picked the car up, they could not get the car to link up when they went through the handover, but said this happens sometimes and should be ok in a day or two.
Today I managed to link up to the Lexus servers via the Lexus Link + app, so I thought all was OK, but if I got to the head unit and click on Lexus it says an error has occurred, try again later.
Is this likely to come online in the next day or so, or do I need to uninstall and start again?
Thanks