Add olive oil to Instant Pot and select saute mode.
Saute ground beef for 4-5 minutes until lightly browned, season with salt and pepper
Turn off saute mode by pressing cancel.
Add onion,celery, garlic, chili powder, cumin, salt & pepper, diced tomatoes, red, orange, and yellow peppers, and jalapeno (optional), broth and pasta in that order.
Gently press the pasta down into the broth so it is covered.
Put the lid on the pot, locking it into place.
Set valve to sealing.
Cook on high pressure for 4 minutes, then do a quick release of pressure. Remove lid and stir in kidney beans, green pepper, and shredded cheese.
Serve in large bowls garnished with green onions if desired.