Lay out frozen puff pastry on bench (keep plastic on). Cover and let it defrost for 5 minutes until it loses its stiffness
Add softened butter, granulated sweetener and ground cinnamon to a bowl and mix together well so the it resembles a paste.
Spread cinnamon mixture over puff pastry, all the way to the edges.
Working quickly, start at one side, folding over and forward, rolling into a log.
Slice in half with a sharp knife, then slice each half piece into four, so that there are 8 mini rolls in total.
Lay each piece flat side down into air fryer and spray lightly with oil if using. Cook for 12 minutes at 180 degrees C/ 350 degrees F.
Open air fryer and turn cinnamon rolls over and cook for a further 3 minutes.
Remove cinnamon rolls from air fryer onto a rack to cool and make the glaze.
Glaze: Add softened cream cheese, powdered sweetener and lemon juice and mix through. Add water a tiny bit at a time, until you get a sauce like consistency, suitable for drizzling.
Use a spoon to drizzle on top of each cinnamon roll.