Preheat the oven to 350°F.
To make the strawberry sauce, combine strawberries, sugar, and lemon juice in a medium saucepan over medium-low heat.
Stir occasionally for about 10 minutes until the strawberries soften and break down.
Use an immersion blender or food processor to puree the sauce until smooth, then refrigerate in a heatproof container.
For the crust and crumble, pulse Nilla wafers in a food processor until fine, then blend in melted butter and freeze-dried strawberries until combined.
Press part of this mixture into the bottom and sides of a 9-inch springform pan, saving about 1 cup for later.
Bake the crust for 10 minutes, then let cool.
In a stand mixer, beat cream cheese and sugar until creamy, then add milk, flour, and vanilla, mixing gently just until combined.
Pour the filling into the crust and smooth it to the edges; a few crumbs in the batter are fine.
Bake for 35–40 minutes, until the center is set but slightly wobbly.
Cool at room temperature, then refrigerate for at least 4 hours or overnight.
Once fully chilled, release the springform pan, loosen the edges if needed, and carefully transfer the cheesecake to a serving plate.
Top with half the strawberry sauce, spreading it near the edges while leaving a ¼-inch rim, then sprinkle with reserved crumble.