Line bottom of Air Fryer with parchment paper and brush with butter.
In a medium bowl, combine butter, brown sugar, cinnamon, and a large pinch of salt until smooth and flfluffy.
On a lightly flfloured surface, roll out crescent rolls in one piece.
Pinch seams together and fold in half.
Roll into a 9"-x-7" rectangle.
Spread butter mixture over dough, leaving 1/4-inch border.
Starting at a long edge, roll updough like a jelly roll, then cut crosswise into 6 pieces.
Arrange pieces in prepared Air Fryer, cut-side up, spaced evenly.
Set Air Fryer to 350°F, and cook until golden and cooked through, about 10 minutes.
Make the glaze:
In a medium bowl, Whisk cream cheese, powdered sugar, and milk together.
Add more milk by the teaspoonful, if necessary, to thin glaze.
Spread glaze over warm cinnamon rolls and serve.