In a medium bowl, beat 1/2 cup of the cream until it holds stiff peaks. Set aside
Set a heatproof bowl over a pan over barely simmering water. Keep the heat very low, and add the white chocolate chips and cocoa butter. Stir until smooth and melted. Remove from heat.
In a large bowl, beat the cream cheese with the sweetener and vanilla extract. Beat in the white chocolate mixture until smooth. Add the remaining 2 tbsp of whipping cream to the cream cheese mixture and beat until combined.
Fold the whipped cream into the cream cheese mixture until well combined. Spoon or pipe into 4 dessert glasses and top with fresh berries.