Mix flour and yogurt together to form a thick dough. Let it rest for 10 minutes before rolling it out.
Cut the dough into 4 sections and roll each section into a long rope; then slice the dough into 1-inch pieces with a floured knife.
Lightly spray the basket of the air fryer with olive oil. Place pretzel bites into the basket, giving them enough room to expand and cook for 4 minutes at 375F, or until lightly browned on top.
Brush with butter and sprinkle with sea salt; then return back to the air fryer for another 1 minute.