Add all barbecue sauce ingredients to a small pot. Over medium-high heat, bring sauce to a slight boil. Reduce heat to medium-low and allow sauce to simmer for 10 minutes.
To a medium bowl, add chicken wings and coarse salt. Stir until wings are coated in salt.
Add salted wings to the Instant Pot insert. Pour sauce over top of wings.
Seal the Instant Pot lid and set to Manual setting for 10 minutes.
After the timer goes off, using the quick release method, depressurize the Instant Pot.
Turn on oven broiler and move oven rack to second from the top. Line a baking tray with aluminium foil and set a baking rack on top of lined tray. Spray baking rack with avocado oil cooking spray.
Using a tongs, transfer wings from the Instant Pot insert to baking rack.
Using a basting brush, brush barbecue sauce from the Instant Pot insert onto both sides of the chicken wings.
Broil wings for 8-10 minutes, flipping halfway. Be sure to watch the wings to ensure they only slightly char and do not burn.