Velvet the chicken: Pound chicken breast to an even 1/2-inch thickness. Mix baking soda and water, coat chicken all over. Salt both sides. Let sit 15-30 minutes.
Cook the chicken: Pat chicken completely dry. Rub 1 tsp oil on one side. Heat pan or sheet pan over medium-high (or oven at 425°F). Cook oiled side down 4 minutes until golden. Add remaining oil on top, flip, cook 4 more minutes. Rest chicken.
Make the glaze: Reduce heat to low. Deglaze pan with a splash of water, scraping up browned bits. Add gochujang, white miso, soy sauce, ginger paste, and Bachan's Sweet Honey. Stir until smooth and simmering.
Glaze the chicken: Chop rested chicken into bite-sized pieces. Add to pan with half the apple matchsticks and half the sliced green onions. Stir to coat. Simmer 2 minutes until sauce thickens and clings to chicken.
Make the slaw: In a bowl, whisk Greek yogurt, honey, rice vinegar, and toasted sesame oil. Add Asian salad mix, remaining apple, and remaining green onions. Toss to coat.
Assemble the burritos: Lay tortillas flat. Divide avocado slices, then glazed chicken, then slaw among them. Wrap tightly: fold sides in, roll from bottom. Don't overstuff.
Toast until golden: Heat a dry pan over medium heat. Place burritos seam-side down, cook 2 minutes per side until golden and crisp. Serve immediately or cool for freezing.