Make a simple syrup: combine sugar and water in a small sauce pan and heat over medium high heat. Cook and stir until all sugar had dissolved. Remove from heat and add a few sprigs of thyme. Let cool.
In a large pitcher or punch bowl, combine remaining ingredients and stir well. Add simple syrup to taste. Pour over ice and garnish with apple slices and thyme sprigs.
Recipe by at https://www.adventuregathereat.com/sparkling-cider-thyme-mocktails/