Start by adding the french fries in a single layer in your air fryer basket. You may have to do two batches.
Set your air fryer temperature to 400 F for 4 mins. Shake basket. Heat 4 more minutes.
Begin preparing your toppings: Cook, cool, and chop the bacon. Finely chop parsley and jalapenos if using. Wash and dice the green onion if using. Set all aside, but it's best to have these ready so you can serve warm plated fries as soon as they come out of the air fryer.
While the fries are cooking, combine the sour cream and 1 T of milk or water. Gently stir and set aside. If it's still very thick, you can add another T so it's creamy but easier to pour.
Remove the fries from the air fryer but keep them in the basket. Sprinkle on the shredded cheese and heat for up to a minute so the cheese is melted but not browning.
Spoon out ½ c canned cheese with the other 1 T of milk or water, and heat in the microwave so it’s pourable and warm, about 20 seconds. Same note as the sour cream: add more liquid if needed so it's easier to pour. Set aside.
Use tongs to transfer the cheesy fries to a serving plate.
Drizzle on the warmed liquid cheese, add the cooked crumbled bacon, chopped jalapenos, then drizzle the sour cream and garnish with dried chives, chopped green onion, and/or some scissored fresh parsley.
Serve warm.