In a mixing bowl add the olive oil and spices. Mix well.
Add the pork chunks and stir them to make sure they are completely coated with the oil/spice mixture. Set aside.
Chop the onion into a ½ inch dice or so.
Pour the orange juice into the Instant Pot inner liner.
Add the cinnamon stick.
Add the pork chunks and the chopped onion to the pot and stir just to combine.
Place the lid on the IP and set knob to the Sealing position.
Press the Pressure Cook (or Manual button) or dial, and use the +/- buttons to adjust the time to 35 minutes. Make sure it is set to High Pressure.
After cooking cycle ends, let it sit and naturally release pressure for 15 minutes.
Then Manually release the remaining pressure.
When the pin on the lid drops, and it is safe to open the lid, open it facing away from you, to be safe. Not the kind of facial you want!
Remove meat to a plate or bowl and shred, using two forks. Don’t shred too much as you want to have some slightly bigger pieces.
Very carefully strain the liquid in the pot, (saving the onions, and discarding the cinnamon stick) into a fat separator.
Pour as much of the degreased liquid as you want into a large serving bowl with the pork and the onions, and mix well.