greek yogurt blueberry crunch bagels

0 Whisk together the flour, baking powder, sugar, cinnamon, and salt in a medium bowl. 
1 Gently fold together yogurt and blueberries in a small bowl. Add to the flour mixture and fold and press with a rubber spatula until a shaggy dough forms (it will look dry). 
2 Transfer to a work surface and knead until smooth. (Dust with flour if it gets too sticky). Divide into 4 pieces. Let rest while you make the topping. 
3 For the topping: melt the butter in the now-empty yogurt bowl. Add the flour, sugars, and cinnamon. Stir until clumpy.  
4 Roll the dough balls into 6 to 8-inch ropes and bring ends together. Brush with egg wash and sprinkle with topping.
5 Air fry at 325°F in a greased, preheated air fryer until golden brown, 18 to 20 minutes. (Alternatively, bake in the upper third of a 375°F oven on greased parchment for 25 to 30 minutes). 
6 Let cool 15 minutes before slicing. (This prevents the insides from being too soft). Enjoy as-is or toast halves before spreading with cream cheese or butter.