If your rib are fresh, remove the membrane from the back of the ribs. The easiest way to to this is to use a knife to cut yourself a hand hold. Then pull on the membrane to remove it.
Pour the cup of apple cider vinegar into the Instant Pot
Place the cooking rack into the Instant Pot
Throw the (even if their frozen) ribs into the Instant Port
Turn the ribs on to high pressure for 50 mins
If you haven't made the BBQ low FODMAP Sauce now is the time.
Mix all the dry spice in a bowl. Stir Well
Combine the spice and BBQ sauce in a bowl. Stir well.
When the 50 minutes is up, turn oven on broil @450f
Once the ribs have cooked allow to naturally release for 10 mins. After 10 mins you can vent (manually release) the Instant Pot.
Brush the sauce onto the ribs.
Place on a baking tray with Tinfoil on them to make cleanup a breeze.
Broil the BBQ sauce until it starts to bubble. ~5 mins
These ribs are so fall off the bone I usually lose a couple of them before even serving