In a medium bowl, mix the softened cream cheese and ranch seasoning until smooth. Stir in the shredded chicken, crumbled bacon, and shredded cheddar until evenly combined.
Unroll the crescent dough on a flat surface. If using triangles, pinch every two triangles together to form 4 rectangles, then cut each rectangle in half to make 8 squares. If using a crescent sheet, cut into 8 equal squares.
Place 1½ to 2 tablespoons of the chicken mixture in the center of each square. Pull the corners up and over the filling, pinching all seams firmly to seal.
Line your air fryer basket with parchment paper or lightly spray with cooking oil. Place the bites seam-side down with space between each.
Brush the tops lightly with egg wash, if using, for a golden finish.
Air fry at 330°F (165°C) for 8–10 minutes, until the bites are deeply golden brown and the dough is fully cooked. Check at 8 minutes — every air fryer runs slightly differently.
Let rest for 1–2 minutes (the filling is hot), then serve warm with ranch, honey mustard, or hot sauce for dipping.