In a large bowl, whisk together pumpkin puree, sweetened condensed milk, egg, cinnamon, nutmeg, clove, ginger, and salt until smooth.
Divide the filling evenly among the 6 mini graham cracker crusts, filling them to the brim. Place the filled crusts into the air fryer basket, cooking in batches if necessary.
Air fry at 300°F (150°C) for 10-12 minutes. Gently jiggle the basket; if the center is still liquidy, continue air frying for a few more minutes until semi-firm. Turn off the air fryer and let the pies rest inside for 10 minutes to finish cooking with residual heat.
Carefully remove the pies from the air fryer and let them cool completely. Top with whipped cream or whipped topping, and a sprinkle of cinnamon if desired.
Notes
Nutrition information is an estimate, calculated automatically. Values vary with brands, substitutions and portion sizes.