In a medium bowl, beat cream cheese, sugar, egg, vanilla, lemon juice, and sour cream until smooth.
Unroll crescent or biscuit dough and cut into 16 squares.
Spoon about 1 tsp of filling into each square and fold edges up and over to seal like a pouch.
Brush each bite with melted butter and roll in graham crumbs if using.
Place in air fryer basket (lined if needed), leaving space between each.
Air fry at 320°F for 6–8 minutes until golden brown.
Let cool slightly and dust with powdered sugar before serving.