Strip corn of leaves and trim both ends flat.
Microwave each ear for 1 minute to soften, then let cool 2 minutes.
Using a sharp knife, slice each ear in half lengthwise through the center, then cut each half in half again to make 4 quarters per ear.
Melt 1/4 cup butter and mix with 3/4 tsp black pepper, then brush generously over all corn ribs.
Preheat air fryer to 400F.
Place corn ribs cut-side down in basket without overcrowding and cook 8 minutes until edges char and kernels are golden.
While corn cooks, mix remaining 1/4 cup butter with remaining 3/4 tsp black pepper, Parmesan, and Pecorino Romano into a spreadable paste.
Spread cheese butter paste over hot corn ribs immediately after cooking.
Sprinkle extra Parmesan and Pecorino over top and serve immediately.