In a medium saucepan over medium heat, add the cherries and 1/4 cup of the sugar and cook, while stirring, until the cherries release their juices and come to a simmer.
Simmer the cherry mixture, while stirring occasionally, until they are tender and falling apart, about 15-20 minutes.
Transfer the saucepan from the heat.
Set a fine-mesh sieve over a large bowl.
Pour the cherry mixture into the sieve, then using the back of a spoon, gently press the cherry mixture through the sieve.
Transfer the macerated cherries and the juices back to the saucepan.
Add the maple syrup, the lemon juice, and 1 teaspoon of the almond extract to the cherry mixture and stir to combine.
Bring the cherry mixture to a simmer over medium-high heat.
Reduce the heat to medium-low and simmer until it is reduced by 1/3 and slightly thickened.
In a large bowl, sift the flour, the baking powder, the remaining sugar, and the salt together.
Add the poppy seeds to the flour mixture and stir to combine.
In a separate large bowl, add the milk, the egg yolks, 6 tablespoons of the melted butter, and the remaining almond extract and whisk to combine.
Add the flour mixture to the milk mixture and mix just until a batter forms. The batter should be slightly lumpy.
In a separate mixing bowl, add the egg whites and using an electric hand mixer, beat until medium peaks form.
Add 1/2 of the egg whites to the batter and using a rubber spatula, gently fold to combine.
Add the remaining egg whites to the batter and fold gently to combine.
Heat a large skillet over high heat or a griddle to 350 degrees F.
Add 1 tablespoon of the remaining softened butter to the hot skillet and allow it to melt.
Working in batches, add the pancake batter in 1/2 cup measurements to the melted butter and cook until bubbles begin to form, about 2-3 minutes.
Flip the pancakes and cook until golden-brown on all sides, about 2-3 minutes.
Transfer the cooked pancakes to a plate and keep them warm.
Repeat with the remaining softened butter and the remaining batter.
Serve immediately topped with the cherry syrup, the whipped cream, the berries, and the almond slices.