In a large mixing bowl, combine self-raising flour and sweetened Greek yogurt. Stir until a soft dough forms, then transfer it to a floured surface. Knead gently for about 1 minute.

Once the dough is ready, divide it into equal portions. Roll each piece into a log shape, then cut the logs into small segments, about 1.5 inches long, and shape into donuts.

Preheat your air fryer to 350°F (180°C) for 5 minutes. Lightly grease the basket. Place the donut bites in the basket, ensuring they are slightly apart. Air fry for approximately 5 minutes.

Remove the donut bites from the basket and place them in a bowl. Drizzle melted butter over them and toss in a mixture of granulated sugar and ground cinnamon until fully coated.

Present your air fryer donut bites on a serving plate. Enjoy them plain or drizzled with melted chocolate.