Installing the mobile app away from home

Is there a way to install and configure the official mobile app when you don’t have access to the network? I switched to a new iPhone and I had to reinstall the mobile app, but it wants to search the network and I will not be home for awhile. I do have the cloud access via Nabu Casa.

use the nabu casa remote URL because discovery only works on the network. you should be able to manually enter it right?

I will try again, but it did not work in the past. It only asks for one address .

Update: I get this error.

Thanks