This is a simple method to steam live Crawfish in an Instant Pot, you can fill Instant Pot to the top with crawfish, as long as you can close the lid. If you steam the crawfish, they are unseasoned – I use this method because I prefer to coat crawfish in an amazing Spiced Cajun-Butter sauce called Whole ShaBang Sauce (recipe here) be sure to dip the tails in the extra sauce! I only eat the tails & steaming is perfect for me, but if you prefer the crawfish to be juicier so you can enjoy the crawfish heads, boiling is a better method.
I steamed 5 lbs of Crawfish in a 10 qt Instant Pot