Preheat the air fryer to 350 degrees. Cut the loaf of bread into one-inch slices.
Brush both sides of each slice of bread with melted butter and top with garlic powder.
Place the bread slices in the tray or basket of the air fryer.
Cook for 4 minutes, then remove the tray or basket and flip the slices. Top each slice with a small amount of shredded cheese and cook an additional two minutes.