Begin by lightly misting your air fryer basket with olive oil spray. Then, preheat your air fryer to 400°F (200°C).
Place the thawed hash browns into a food processor. Pulse a few times until they are finely chopped but still have some texture, avoiding a mashed consistency.
In a spacious mixing bowl, gently fold together the finely chopped hash browns, olive oil, all-purpose flour, garlic powder, onion powder, and ½ teaspoon of kosher salt. Mix carefully to ensure everything is just combined without overworking the potatoes.
Scoop out roughly one tablespoon of the potato mixture at a time. Shape it into a small, 1-inch cylindrical tater tot in your hand and arrange it in a single layer in the air fryer basket. Ensure the tots don't touch each other for best crispiness; you might need to cook in batches.
Lightly spray the tops of your formed tater tots with olive oil cooking spray. Cook them for 16 to 18 minutes, making sure to shake the air fryer basket halfway through the cooking time. This helps them cook evenly and become perfectly golden and crispy.
Once they're beautifully golden and crunchy, remove the tater tots from the air fryer. Sprinkle them with an additional pinch of salt if you like, and serve immediately for a delicious, healthy side!