Preheat the oven or an air fryer to 400°F (200°C).
Brush both sides of the naan bread lightly with olive oil and place on a baking sheet.
Toast the naan in the oven for 3 minutes to create a firm base.
Spread 1/4 cup of tzatziki sauce over each piece of toasted naan.
Distribute the shredded chicken, cherry tomatoes, and red onions evenly across the pizzas.
Bake for 6 to 8 minutes until the chicken is heated through and the naan edges are golden brown.
Remove from the oven and immediately top with fresh diced cucumber and crumbled feta cheese.
Garnish with dried oregano and fresh dill before slicing and serving.