Turn your Instant Pot on Sauté, Normal. Melt butter in the Instant Pot.
While the butter is melting, make sure the chicken breasts are 1 inch in thickness. If they are too thick, put them in a zip top bag and use your rolling pin to flatten them a bit. Generously season one side of the breast.
Once the butter has melted, add the chicken breasts, seasoned side DOWN, to the Instant Pot. Season the side facing up (the unseasoned side). Let the chicken brown for 5-7 minutes on each side.
Remove chicken breasts from the Instant Pot and deglaze the pot with the water. Once the pot has been deglazed, insert the trivet, place the chicken breasts onto the trivet.
Cook on Manual, HIGH for 5 minutes. Allow for a 5 minute NPR then quick release the rest of the pressure. Take lid off, but let chicken sit and rest for another 5 minutes.
Once the chicken has rested, take out of the Instant Pot and either enjoy, slice or shred!