JFK - BCN is all Level. Level is just a brand, the operating airline is Iberia. That means that Iberia is technically running the flight (and it will have an Iberia flight number), but the branding is Level, the plane is Level, the service is Level - which is just a brand within the Iberia operating certificate (the official airline).

You need to go to the Iberia website to see your itinerary.

If you go to seatguru, they have the Level version of the long haul A330 that is used on the JFK-BCN route under the Iberia section: https://www.seatguru.com/airlines/Ib...-200_LEVEL.php