Acorn squash can be air fried in any type of air fryer, including both basket and oven style air fryers. Make sure to buy a squash that fits your air fryer, as larger acorn squash may not fit in smaller basket-style air fryers, even when cut. I use my Instant Pot Duo Crisp for small acorn squash and my Instant Omni Plus for larger ones. The time and temperature remains the same.