Preheat the oven to 350F/ 176C.
In a large mixing bowl, add softened cream cheese, softened butter, sweetener, vanilla extract, and almond flour. Mix it all up with a rubber spatula until it forms a smooth paste.
In a parchment prepared 8x8 inches square baking pan, add your dough and spread it evenly across the surface. Make sure the dough has an even thickness. Place it in the preheated oven for 15 minutes.
In a medium-size sauce pan over low heat, add heavy cream, granulate allulose sweetener, vanilla extract, and whisk until fully combined and the sweetener has melted. Once the sweetener melts, add room temperature unsalted butter, and stir in until it fully melts. Whisk to combine and turn off heat. Pour the liquid on to a large mixing bowl to cool down to room temperature.
Add chopped pecans on top of the baked crust forming an even layer. Proceed to mix the remaining ingredients of the custard once it's cooled down. Add maple extract, salt, eggs, and whisk until fully incorporated. Pour the mixture over the baked crust and top it off with 1/2 cup of pecan halves for aesthetic.
Bake in your preheated oven at 325F/ 162C for 40-45 minutes. Rotate the pan halfway through baking for an even color on top. When pulled out, it should be firm but with a very slight jiggle. Let it cool completely and remove the parchment paper before cutting. Enjoy!