Pour the Chex™ granola mix into a food processor and process until you achieve a fine crumb. Transfer to a large bowl and drizzle melted butter over the top. Sprinkle with flour. Use a fork to combine mixture into coarse crumbs. Spread half of the mixture into an 8×8-inch dish covered with parchment paper.
In a stand mixer, beat together cream cheese, simple syrup, whipped topping and yogurt until light and fluffy. Fold in mandarin oranges. Spread mixture over the crust. Top with remaining crumb.
Cover and freeze for 3 hours or more and enjoy!