Whisk together the sweetener and egg yolks for at least 3 minutes using a blender. Beat to dissolve the sweetener entirely. Wait till the mixture becomes creamy enough.
Place a medium saucepan over medium-low heat. Pour gently the heavy cream and almond milk in. Mix well with the nutmeg, vanilla, cinnamon, and cream cheese. Leave for 5-10 minutes without allowing it to boil. Stir every now and then.
Transfer the egg mixture into a jar. Slowly add the cooked cream. Add a decent amount of rum and mix well with a spoon. Top with a pinch of cinnamon and drop some ice if preferred. Alternatively, simply let the eggnog cool in the fridge for a couple of hours. Serve cold.