Dissolve Gelatin: Combine water and gelatin in a small bowl. Let sit for 1 minute. Microwave for 5-10 seconds until melted. Cool slightly.
Beat Cream Cheese: In a large mixing bowl, beat the cream cheese until smooth, about 2 minutes. Add 1/2 cup powdered sugar and beat until combined. Scrape the bowl.
Add Ingredients: Mix in sour cream, vanilla extract, 3/4 cup strawberry puree, and dissolved gelatin until combined.
Whip Cream: In another bowl, whip the heavy cream with the remaining 1/2 cup powdered sugar until stiff peaks form, about 3 minutes.
Fold Cream: Gently fold half of the whipped cream into the cream cheese mixture, then fold in the remaining whipped cream until smooth.
Layer Cheesecake: Remove the crust from the freezer. Pour 1/3 of the cheesecake batter into the crust. Smooth with a spatula. Drizzle a few tablespoons of strawberry sauce and swirl gently. Repeat layers, finishing with a smooth layer on top.