Combine cream cheese and Truwhip in a stand mixer or food processor until smooth

Line a rectangular baking pan with parchment paper

Spoon a layer of cream cheese mixture on top of parchment paper to set graham crackers

Layer graham crackers on top of cream cheese mixture

Spoon a layer of cream cheese mixture onto graham crackers

Layer strawberries on top of cream cheese mixture

Add another layer of graham crackers

Spoon another layer of cream cheese

Repeat for a total of 3 layers

Top last layer of graham crackers with cream cheese mixture

Arrange blueberries and raspberries into flag shape

Refrigerate for 4 hours or overnight