Preheat the air fryer to 400°F / 200°C for 3 minutes.
Rub the potatoes with olive oil and pierce each 3 to 4 times with a fork, then air fry for 35 to 40 minutes until tender when squeezed.
Let the potatoes cool for 5 minutes, then slice each in half lengthwise and scoop the flesh into a bowl, leaving a 1/4-inch shell.
Mash the potato flesh with sour cream, butter, half the cheddar, chives, salt, and pepper until smooth, then spoon the mixture back into the shells and top with remaining cheddar.
Air fry the stuffed potatoes at 375°F / 190°C for 8 to 10 minutes until the cheese is melted and the tops are golden.
Serve immediately while the filling is creamy and the edges are crisp.