Add oil to a frying pan, pot, or to the insert to your Instant Pot. If using the Instant Pot, set to high saute.Mix flour, salt, and pepper and place in a bowl.Place milk in another bowl.Dredge the shrimp in the milk, then the flour mixture, and shake off excess.Fry in oil until cooked – remove with a slotted spoon and put on a paper towel. Repeat with all shrimp.Melt butter and garlic and lemon. If you are using your Instant Pot, remove the oil, clean out the pot, and place these ingredients in there.Add peppers and about 1.5 tablespoons of the seasoning and saute over low heat.Drizzle the sauce and peppers over the top of the shrimp and serve with ranch dressing