Set the Instant Pot on SAUTE function and set it on HIGH.
Add oil. When the oil becomes moderately hot gently add the marinated pork leaving behind any excess marinade. We'll be adding that later. Sear the pork pieces very well until they are nicely browned around the edges. Scrape the sides and the bottom of the steel pot continuously while you sear the meat. Don't worry about the browned bottom of the pot. This will enhance the taste of the dish. Moreover, we'll be de-glazing the pot later.
Once, the pork is well seared add 1/2 cup water, the cider vinegar any excess marinade. De-glaze the pot very well with the help of your spatula. There should not be any bits and crumbs stuck at the bottom of the steel pot. This is very important to avoid the BURN sign in your Instant Pot.
Throw in the whole garlic cloves, smash them slightly with the back of your knife before adding them to the pot. Also add the rest of the bay leaves. Give everything a good mix.
CANCEL the SAUTE function. Close the lid of the Instant Pot and SEAL the valve. PRESSURE COOK on HIGH for 10 minutes.
Once, the pressure cooking cycle is over the Instant Pot will begin to beep. Wait for a Natural Pressure Release (NPR) for 10 minutes and than release the rest of the pressure manually by moving the valve from the SEALING to the VENTING position. Carefully open the lid of the pot.
Serve the Instant Pot Pork Adobo hot and enjoy!