Line a muffin tin or silicone cups with cupcake liners and lightly spray the liners with baking spray.
In the bowl of a stand mixer, combine the spice cake mix, pumpkin puree, eggs, oil, water, and pumpkin pie spice. Mix on low for 30 seconds, then on medium for 2 minutes, scraping down the bowl halfway through.
Using an ice cream scoop, fill each liner about two-thirds full.
Place the filled cups in the air fryer basket in a single layer with space around each. Air fry at 320°F (160°C) for 12 to 14 minutes, until a toothpick inserted in the center comes out clean. Work in batches to avoid crowding.
Let the cupcakes cool in the basket for 2 minutes, then transfer to a wire rack to cool completely.
For the frosting, beat the softened cream cheese and butter until smooth. Add the vanilla and salt, then gradually beat in the powdered sugar until light and fluffy.
Frost the fully cooled cupcakes. Dust with extra pumpkin pie spice or cinnamon if desired.