Before beginning clean your green beans and snap the ends off if you prefer them that way.
Grab three bowl. In the first bowl add your flour. In the second crack the egg and whisk it. In the third bowl combine the breadcrumbs, cheese, garlic powder, and salt.
Pat the green beans dry then dunk it in the bowl of flour, dip in the egg, then into the breadcrumb mixture. Repeat with all green beans.
Heat your air fryer to 400 degrees Fahrenheit. Place each bean on the bottom, trying not to overlap them. Cook for 5 minutes.
After 5 minutes flip them and cook additional 1 minute.
Notes
When dredging your beans you do not have to do them one by one. If you are able to do multiple at a time, that would make the process quicker.