Add 2 cups of water to the insert of a 6 or 8qt Instant Pot.
Secure the lid into place and move the valve to "sealing." Cook on high pressure for 4 minutes.
When the time is up, hit "cancel" and safely switch the valve to "venting." Allow the pot to do a full manual pressure release. Once the pin has dropped, carefully remove the lid.
Add the sugar to the water in the Instant Pot and whisk well to combine,
Then, add the baking soda. Whisk again.
Finally, add the tea bags. Use a spoon to ensure the tea bags are submerged.
Replace the lid, and let this mixture steep for 15 minutes.
When the 15 minutes are up, carefully remove the lid. Pressure may have built up under the lid, so you may need to do another manual pressure release.
Remove the tea bags, squeezing them to remove any tea.
Add 6 cups of cool water, and whisk well to combine.
Transfer your iced tea to a large glass jug, or half gallon jar. Place a lid on the jug or jar, and chill in the fridge before serving.
Serve with fresh lemon wedges, if desired.