Scrub potatoes thoroughly and pat dry with paper towels.
Prick the potatoes several times with a fork and rub the skins with olive oil and salt.
Place potatoes in the air fryer basket and cook at 400°F (200°C) for 40 minutes or until the internal temperature reaches 205°F.
Remove potatoes from the air fryer and allow them to cool for 5 minutes until they can be handled safely.
Slice each potato in half lengthwise and scoop the flesh into a medium mixing bowl, leaving a 1/4-inch thick shell.
Mash the potato flesh with butter, sour cream, milk, black pepper, 1/4 cup of the cheese, and 1 tablespoon of the bacon bits until smooth.
Spoon the mashed mixture back into the potato shells, mounding it slightly.
Top the potatoes with the remaining 1/4 cup of cheese and 1 tablespoon of bacon bits.
Place the stuffed potatoes back into the air fryer and cook at 350°F (175°C) for 5 to 7 minutes until the cheese is melted and the tops are slightly golden.
Garnish with fresh chives before serving.