Place a 6-qt Instant Pot on Saute setting. Add 1 Tbsp of the olive oil. When oil is hot, add chicken, and cook for 4 to 6 minutes, turning once, until browned. Remove from pot and Add remaining 1 Tbsp olive oil to pot. Add next four ingredients (through garlic) and 2 Tbsp Cajun seasoning cook for 3 to 4 minutes or until tender, stirring frequently. Add cooked chicken and the next four ingredients (through tomatoes) to the pot and stir to combine.