Preheat oven to 425°F (220°C) or preheat your air fryer according to manufacturer instructions.
Heat 1 tablespoon olive oil in a large skillet over medium heat.
Add the diced chicken to the skillet and season with 1 teaspoon ground cumin, 1 teaspoon chili powder, and 1/4 teaspoon cayenne pepper; cook, stirring occasionally, until the chicken is cooked through.
Stir in the chopped red bell pepper, 1 cup frozen corn, 2 cups chopped kale, and 1 cup salsa; cook until the pepper is tender and the kale has wilted.
Remove skillet from heat and stir in the chopped green onions, 1/4 cup chopped parsley, and salt and pepper to taste; mix thoroughly and let the filling cool slightly.
Lay out an egg roll wrapper with a corner pointing toward you. Spoon about 1–2 tablespoons of the filling into the center of each wrapper.
Brush the edges of the wrapper with a little water, fold the bottom corner over the filling, fold in the side corners, then roll up tightly to seal.
For baking: place rolls seam-side down on a parchment-lined baking sheet and brush each with melted butter; bake at 425°F (220°C) for about 15 minutes or until golden brown.
For air frying: arrange rolls in a single layer in the air fryer basket without overcrowding and air fry at 400°F (200°C) for 10–12 minutes, turning halfway, until golden and crispy.
Serve the egg rolls hot with extra salsa or your preferred dipping sauce.