Hit SAUTE on Instant Pot, and when it reads HOT, add 2 tablespoons butter and chicken. Sprinkle with sea salt, and cook chicken until no longer pink, stirring frequently
Pour 1/4 cup hot sauce over chicken, stir, then hit CANCEL to turn pressure cooker off
Add uncooked macaroni and 2 tablespoons butter over chicken, then pour water over and around macaroni
Place lid on Instant Pot, turn valve to Sealing position, and hit PRESSURE COOK for 4 minutes. Pot will take about 10 minutes to pressurize, then cook for 4 minutes
When pot beeps, do a gradual quick release to reduce liquid from spraying out of pot. When pin drops, remove lid, and stir
Stir in remaining 1/4 cup of hot Buffalo sauce, 1/2 cup heavy cream, (or ranch) and gradually add cheese, 1 cup at a time, stirring well after each cup is added