Preheat oven to 325°F (160°C). Line an 8x8 inch baking pan with parchment paper.
Mix almond flour, melted butter, and granulated sweetener until crumbly. Press firmly into the pan to form a crust.
Beat softened cream cheese with powdered sweetener until smooth. Add eggs one at a time, mixing after each.
Stir in vanilla, lemon juice, and lemon zest until combined.
Pour filling over crust and spread evenly. Sprinkle blueberries on top.
Bake for 35-40 minutes until center is set but still slightly jiggly.
Cool completely, then refrigerate at least 3 hours before slicing into bars.