Cut bananas into thirds. Combine sugar and cinnamon in a small bowl. Whisk together flour and water in separate small bowl.
Working one at a time, roll the banana pieces in cinnamon sugar mixture until well-coated. Place egg roll wrapper on work surface with point facing you. Place coated banana across wrapper in bottom 1/3. Roll lower corner of wrapper up over banana. Press sides of wrapper flat against cut sides of banana, and then fold side corners into the center. Roll banana away from you again, so that the top corner is still sticking out. Dip finger in flour water mixture and dab onto exposed corner and edges. Roll banana over top corner and press to seal. Set wrapped banana onto Air Fry Kit and repeat with remaining bananas and wrappers. Spray tops and sides of rolls with olive oil cooking spray.
Place Air Fry Kit onto glass turntable. Press “Air Fry” button and use “+/-” buttons to navigate to 400°. Press “Start” then use “+/-” button to set timer for 12 minutes. Press “Start” and cook until spring rolls are crispy.
Remove spring rolls from oven and drizzle with chocolate sauce or serve with chocolate for dipping.