Add the trivet to the Instant Pot.
Place corn, potatoes, sausage, and onion in the Instant Pot®, then pour the chicken broth and minced garlic over everything.
Squeeze the lemon juice over everything, and place the lemon rind in the pot.
Sprinkle the Old Bay seasoning over all the ingredients.
Close the lid, turn the knob to Sealing.
Press Manual or Pressure Cook button and adjust time to 3 minutes.
When the timer beeps, turn the knob from sealing to venting, then remove the lid.
Add in the shrimp, stir, then immediately replace the lid and wait 5-8 minutes.
To serve, carefully dump the contents of the pot into a large serving bowl or platter. Make sure to pour the liquid from the pot over the low country boil. Serve with melted butter, lemons, extra Old Bay seasoning to taste, and a sprinkle of parsley.