Absolutely! You can add spices to strawberries before dehydrating them in the air fryer (or dehydrator, or oven).
Cinnamon is a great choice; also try a light dusting of nutmeg or
even a sprinkle of vanilla sugar. Just be sure to add the spices after slicing
the strawberries while they're moist, i.e. before putting them in the air fryer. Sugar substitutes like "People's brand Keto Sweetener" or Stevia work well. (Yes, that was an Amazon Affiliate link, thanks).