Place the sausages in a parchment or whatever liner you have that designed for air fryers.
In a small bowl or measuring cup, whisk together mustard, syrup, and a pinch of salt until well combined.
Pour the mustard-honey-maple mixture over the sausages and toss to coat evenly.
Insert the liner with the sausages into the air fryer basket.
Cook at 375°F for 10-12 minutes, turning the sausages halfway through to ensure even cooking.
Once cooked, serve warm and enjoy!