The Iberia A350 is something that you will have to vote for over on the Infinite Flight Community. This is the Infinite Passengers Community where all discussions should relate to Infinite Passengers. Infinite Passengers is a third party app for Infinite Flight. Unfortunately, we can’t add any aircraft to Infinite Flight.
See the following guides to learn more about this community:
Feel free to let us know if you need any further assistance! We’re always on hand to help