I make these in XL silicone muffin cases. They are easily transportable and can be eaten straight out the case, so are perfect for a packed lunch. You can also make them in a mini flan tin or springform pan, but make sure it's water tight otherwise it will leak out everywhere - I speak from experience! If making them in something that you won't be serving it in, then grease the dish first to make it easier to get out neatly.
You might find that the toppings sink in and it doesn't look much like a pizza, but it will still be tasty.
You can make these in a conventional oven and sometimes I do this if I happen to have it on for cooking something else. I find that using the oven takes a little longer than the air fryer, so bear this in mind.