Wash and dice the strawberries, then add them to a saucepan with sugar and lemon juice. Cook over medium-high heat for about 5 minutes until juicy and softened. Stir gelatin with 1½ teaspoons water in a small cup and let it bloom.

In another bowl, whisk together cornstarch and 2 tablespoons water. Once the strawberries are bubbling, whisk in the cornstarch mixture and cook briefly until thickened and glossy. Remove from heat and stir in the gelatin until melted.

Transfer to a bowl, press plastic wrap directly onto the surface, and chill for 4–6 hours or overnight. If the filling seems too thin, simmer another minute while stirring.

Preheat the oven to 350°F. Combine graham cracker crumbs and sugar in a bowl, then stir in melted butter until the texture resembles wet sand. Press firmly into a greased pie dish. Bake for 10 minutes until lightly golden and fragrant, then cool completely.

Pour 1¼ cups whipping cream into a chilled bowl and beat until stiff peaks form. Refrigerate while preparing the filling. Cold cream whips faster and holds its texture better.

Beat softened cream cheese on medium speed until smooth and fluffy. Add icing sugar and vanilla extract, mixing until silky. Gently fold in the whipped cream in three additions until fully combined. Avoid overmixing so the filling stays light and airy.

Reserve about ¾ cup of the cream cheese filling for the topping. Stir the chilled strawberry filling gently to loosen it. Spoon large dollops of cream cheese filling into the crust, then add spoonfuls of strawberry filling between them. Swirl lightly with a knife. Repeat with remaining filling and smooth the top. Chill for 4–6 hours until firm. If the filling softens too much during assembly, refrigerate it for 15–20 minutes before continuing.

Beat the remaining whipping cream to soft peaks, then add icing sugar and the reserved cream cheese filling. Beat until stiff peaks form. Pipe onto the chilled pie and decorate with halved strawberries. Warm the reserved glaze slightly and brush over the berries for shine if desired. Chill until ready to serve.