BENEFITS OF CONVECTION OVENS
Circulating air helps dishes cook evenly on multiple racks.
Less rotating dishes between racks.
Promotes browning and crisping.
Fast moving hot air can accelerate baking and roasting.
Quick preheating.
Air Fryer and convection oven, difference is just the size. https://www.bhg.com/recipes/how-to/cooking-basics/convection-oven-vs-air-fryer/#:~:text=Although%20cooking%20times%20for%20recipes,longer%20in%20a%20convection%20oven.