Place the flour and salt in a large bowl. Pour in the boiling water while stirring constantly with a fork or chopsticks until a shaggy dough forms. Once cool enough to handle, turn it out onto a lightly floured surface and knead for about 5 minutes until the dough is smooth and elastic. Cover with a damp towel and let it rest for 30 minutes.
Divide the rested dough into 4 equal pieces. Working with one piece at a time, roll it out into a thin circle about 8 to 9 inches across on a lightly floured surface.
Brush the surface with a thin, even layer of sesame oil. Sprinkle a quarter of the sliced scallions, a pinch of flaky sea salt, and a little white pepper evenly over the top.Roll the circle up tightly into a log shape, then coil the log into a spiral like a snail shell, tucking the end underneath. Press gently with your palm to flatten, then roll it back out into a round about 6 to 7 inches wide. Repeat with the remaining dough pieces.
Whisk together the soy sauce, rice vinegar, chili oil, sugar, and grated ginger in a small bowl until the sugar dissolves. Set the dipping sauce aside.
Preheat the air fryer to 375 degrees F. Brush both sides of a pancake lightly with a bit of sesame oil and place it in the basket. Cook 1 to 2 pancakes at a time depending on the size of your air fryer.
Air fry for 5 minutes, then flip the pancake carefully using a spatula. Cook for another 4 to 5 minutes until both sides are golden brown and the surface is flaky and crispy.
Transfer to a cutting board and cut into wedges immediately. Repeat with remaining pancakes and serve hot with the dipping sauce on the side.