Take the rack of ribs, lay on a paper towel and remove the membrane from the back side. This can be done by loosening with a butter knife, then grabbing with a paper towel to pull off.
In a small bowl, combine the spices to make a spice rub. Add the ginger, coriander, garlic powder, chili powder, and smoked paprika to a bowl and stir to combine.
Take the spice mixture and spread all over the top and bottom sides of the ribs. Cover the ribs loosely with plastic wrap and let sit for 30 minutes.
Take your Instant Pot and place a small rack inside for the ribs to sit on. Add 1 cup of water to the bottom of the Instant Pot.
Take the rack of ribs and curl them so they fit into the Instant Pot.
Place the lid on the Instant Pot, make sure the valve is set to sealing, and then set the Instant Pot on manual pressure for 40 minutes.
Once the ribs are done and the Instant Pot beeps, let Natural Release for 10 minutes. After 10 minutes, release any remaining pressure from the pot.
Set your oven to broil. Take the rack of ribs out of the Instant Pot carefully. The ribs are so tender that bones may literally fall out. Place the rack of ribs on a baking sheet.
Take the hoisin sauce and brush over the ribs. Place the ribs in the oven and broil for 3-5 minutes until nicely browned and caramelized.
Remove the ribs from the oven. Let rest for a few minutes, then slice and enjoy.