Mix the almond flour, cocoa powder, powdered allulose, and salt. Stir in the melted butter until the crumbs are evenly moistened.
Press the crust into a 9-inch springform pan and chill.
Stir the chopped cherries, powdered allulose, lemon juice, and chia seeds together. Let the mixture sit for 15 minutes until thickened.
Beat the cream cheese, powdered allulose, sour cream, vanilla extract, and almond extract until smooth.
Whip the cold heavy cream to firm peaks, then fold it into the cream cheese mixture. Spread the filling over the crust.
Warm the sugar free dark chocolate chips with the heavy cream in short bursts until smooth. Spoon the cherry mixture over the cheesecake, then drizzle with the chocolate.