I have never heard of a toaster oven, so I looked it up. The definition of a toaster oven is
A toaster oven is a small electric countertop appliance that looks like a mini oven but functions as an oven-toaster hybrid. Toaster ovens are mainly used for reheating leftovers, cooking frozen foods, toasting breads and baking in small batches.
An airfryer is defined as: a mini convection oven, in essence. Its promise: to match the taste and texture of your favorite deep-fried foods–minus the all the fat and all those extra calories. except that you can do so much else with an air fryer. In the last three days, I hve cooked stuffed mushrooma and aubergines, made a frittata, and cooked chips.
Going on that a toaster oven is a very different appliance to a toaster oven, which is more like a stand alone grill, that also heats things through than an air fryer that convects high temperatue heat round a small oven.