In a medium bowl, combine the sliced strawberries, the 1/4 cup of granulated sugar, and the optional lemon juice.

Gently stir the mixture until the sugar is dissolved and coats the berries evenly. Set the bowl aside at room temperature for at least 30 minutes. This maceration process creates a rich syrup that will moisten the cake layers.

In a large mixing bowl, using an electric mixer, beat the softened cream cheese until it is completely smooth and fluffy, ensuring there are absolutely no lumps remaining. Add the powdered sugar and vanilla extract; beat on medium speed until light and well combined.

In a separate, very cold bowl, pour the 3 cups of heavy whipping cream. Beat the cream on high speed until stiff peaks form (be careful not to over-beat).

Gently fold approximately one-third of the whipped cream into the cream cheese mixture to lighten it. Once incorporated, fold in the remaining two-thirds of the whipped cream until the mixture is uniform, light, and airy. Do not over-mix, as this will deflate the mousse-like filling.

First Layer (Cake Base): Place half of the cubed pound cake pieces evenly across the bottom of the trifle dish.

Second Layer (Strawberry Syrup): Spoon half of the macerated strawberries and their resulting syrup evenly over the cake layer, ensuring the syrup soaks into the cake pieces.

Third Layer (Cheesecake Filling): Carefully spread half of the prepared cheesecake filling mixture over the strawberries, gently smoothing the surface.

Repeat the Layers: Add the remaining cubed cake pieces (Layer 4), followed by the rest of the strawberries and syrup (Layer 5). Reserve a small handful of the most attractive berry slices for the final garnish. Finally, gently spread the remaining cheesecake filling over the strawberries (Layer 6).

Cover the trifle dish tightly with plastic wrap and refrigerate for a minimum of 6 hours, or ideally overnight. Chilling allows the flavors to meld and the cheesecake filling to set firmly.

Just before serving, garnish the top of the trifle with the reserved strawberry slices or a final dollop of fresh whipped cream.