Preheat oven to 425F
Heat a large oven-safe (stainless steel or cast iron) skillet pan on a medium-high setting. Add a 1 tbsp beef only marinade per steak and sear steaks 2-5 minutes each side, or until a brown crust has formed as the marinade caramelizes.
Place entire pan in the oven and bake for an additional 10-12 minutes, OR (if you only have one large pan) transfer steak to a baking sheet with some additional marinade and cook the same amount of time.
Repeat the process with the chicken breasts. Add chicken only marinade to a large skillet and sear chicken breasts 3-6 minutes (slightly longer) on each side, or under a brown crust has formed as the marinade caramelizes.
Place entire pan in the oven for 20-25 minutes, OR transfer chicken to a baking sheet and cook for the same amount of time.
In a small sauce pan, add all remaining marinades**, gochujang, and salt. Heat on medium-high and bring to a rolling boil. Boil uncovered for 10-12 minutes, stirring occasionally to prevent the bottom from burning. Remove from heat and let cool slightly.
Slice steak and chicken into very thin strips with a sharp knife.
Toss sliced meats in cooled sauce or serve separately on the side for guests to choose their spiciness level. Assemble wraps with cabbage/lettuce, kimchi, avocado, bell peppers, pickled radish/carrots, or whatever sides you prefer!