Combine cream cheese, confectioners sugar, 2 tablespoons softened butter, vanilla, lemon juice, and salt in a medium bowl and mix with an electric mixer or whisk until smooth. Transfer mixture to a resealable plastic bag or piping bag.

Use a paring knife to cut a 1/2-inch slit in one side of each roll. Form a well in the center of each roll through the slit without going all the way through.

Snip the corner of the plastic bag and pipe the cream cheese mixture into each roll. Use a small offset spatula or spoon to ensure ample filling without spilling.

Brush a light coating of melted butter onto each roll.

Preheat air fryer to 400°F (200°C) according to manufacturer’s instructions.

Combine sugar and cinnamon in a shallow dish.