For the Spiced syrup, mix sugar, water, cardamom, and pumpkin pie spice in a small saucepan. Bring to simmer on medium heat, stirring until sugar is completely dissolved. Remove from heat. Allow to cool completely.
For each serving, place 2 ounces gin alternative, 1 ounce each orange juice, lemon juice, aquafaba, and prepared Simple Syrup in cocktail shaker. Shake vigorously for 30 seconds. Add ice, filling about two-thirds full. Shake again until well chilled and foamy, about 30 seconds longer.
Strain mocktails into coupe glasses. Garnish with a twist of orange and sprinkle with additional pumpkin pie spice, if desired. Refrigerate remaining syrup for up to 2 weeks.
