In a mixing bowl, add 2 cups of warm water, yeast, and 3 tablespoons of sugar. Give it a gentle stir, then let sit for 5 minutes until foam and bubbles form.
Add 4 ½ cups of flour and salt to another bowl and gradually stir into the water mixture. Continue to stir and mix until a soft dough forms. Fold in the blueberries.
Add ½ cup of flour to a hard surface and kneed the dough gently until it forms up and is elastic.
Lightly oil a bowl and add the dough. Cover and place in a warm spot for an hour. The dough will double in size.
Add the dough to a lightly dusted hard surface. Divide into 8 smaller pieces and roll into a smooth ball. Using your thumb, punch and smooth a hole into the center of the dough ball.
Place the dough rings on a baking sheet and cover for 25 minutes.
In a large saucepan, bring 8-10 cups of water to a bowl with 1 tablespoon of sugar.
Once the dough is finished proofing, and the water is boiling, dunk each bagel into the bath for a few minutes. Immediately place the boiled bagels in the air fryer basket on parchment. Boil only what you can immediately cook.
Cook at 350°f for 10 minutes, flipping at 6 minutes. Bagels will be fully cooked and ready to eat after cooling.