The Council published the press release Council adopts negotiating position on new law that introduces EU digital travel application. From the text:

The regulation establishes rules on the (voluntary) creation of digital travel credentials and how to use them when crossing external borders.
The EU digital travel application will make it possible to digitally provide travel data before crossing the border. This clears the path for border officers to remotely verify travel documents and check against border, police and migration databases before travellers arrive in person at a border crossing point. This will shorten waiting times and improve security checks. (…)
The application will be an important element in managing external borders. Travellers will still need to carry their passport or identity card when crossing an external EU border.

Backend, mobile component and router
The EU digital travel application will be composed of:

a mobile component (a mobile app)
a backend validation service
a traveller router

All three elements will now be developed by an EU body (eu-LISA) according to the functional and technical requirements included in the regulation.