Blend the cottage cheese in a blender until smooth.
In a mixing bowl, combine flour, baking powder, and salt. Add the blended cottage cheese and stir until a dough forms (feel free to use your hands, but don't knead too much). If the dough is too sticky, add a little more flour.
Place the dough on a lightly floured surface and divide into four equal portions.
Shape each portion into a ball, then roll into a 10-inch-long rope. Bring the ends of the rope together to form a circle, overlapping and pinching the ends together to seal. You can roll the seam on the counter to smooth it out.
Preheat your air fryer to 350°F (180°C) with the Air-Fry function on.
Brush the tops with a beaten egg and sprinkle with everything bagel seasoning, a topping of choice, or leave them plain.
Place the bagels in the air fryer basket, ideally, they don’t touch. Air fry for 10 minutes, or until golden brown and cooked through.
Allow to cool for 15 minutes on a wire rack before slicing.