On the Instant Pot, choose the SAUTE setting on normal to heat the Instant Pot.
Heat olive oil in the Instant Pot, then add the chicken tenders. Season them with salt, pepper, and oregano.
Brown the chicken tenders for 1-2 minutes on each side. This step is optional but recommended for better texture and locking in the flavor.
Remove the chicken tenders from the Instant Pot.
Deglaze the pot by adding a little bit of water and scraping off any bits stuck to the bottom of the pot.
Place the trivet in the Instant Pot, and add a cup of water.
Stack the tenders on the trivet (or use a steamer basket if you prefer).
Secure the lid and set the vent to SEALING. Select the PRESSURE COOK/MANUAL setting and set the cooking time for 3 minutes at high pressure. The Instant Pot will take around 5 minutes to come to pressure and start cooking. When the cooking program ends, quickly release the steam.
Remove the chicken tenders from the Instant Pot, serve and enjoy!