I am looking at a flight from ATL-LIM on a A330-300 for fall of 2025. There does not seem to be a premium select cabin on this plane, only C+. None of the dates I am looking at have GUC availability on Delta.com. EF does show some "Z" availability on random dates but most are 0 even with the planes completely empty. Are there Delta a330-300 planes with no premium select or is there something else weird going on that I am missing? Also, there is no option to book the C+ fare, only main and D1.