Turn the Instant Pot to the saute mode. When it is hot, add 1 tablespoon of olive oil to the bottom of the inner pot. Saute the meat in 2 batches (add more olive oil if needed between batches), turning and browning 1-2 minutes per side. Turn the IP off.
After the 60 minute cook period, allow the pot to naturally release for 25 minutes then do a quick release to completely depressurize. Turn the IP off and remove the lid.