Special equipment: a 6-quart air fryer; a 2-inch biscuit cutter
For the biscuits: Add the flour to a large bowl and stir in the sugar. Use your hands to combine 6 tablespoons of the butter with the flour mixture until the texture is sandy with a few pebbles of butter. Stir in the buttermilk with a wooden spoon until combined, then turn the dough out onto a floured work surface. Press and shape the dough into a 5- to 6-inch round about 1 inch high. Flour a 2-inch biscuit cutter and cut the dough into 10 to 12 biscuits, reshaping when needed. Transfer the biscuits to a plate.
Melt the remaining 2 tablespoons butter. Pour the melted butter over each biscuit, making sure they are all coated. Add the biscuits to a 6-quart air fryer so they are all touching. Cook at 350 degrees F until the biscuits are crusty and golden brown, about 15 minutes (see Cook's Note).
For the honey butter: While the biscuits cook, mix the butter, honey and salt in a small bowl. Set aside or refrigerate until ready to use.
Serve the biscuits immediately with the honey butter.
