In a stand mixer fitted with a whisk attachment, beat the heavy cream, confectioners' sugar, and pudding mix on medium-high until light and fluffy. A large bowl and a hand mixer can be used, but it will not aerate the whipped cream as well and you will likely have to make a double batch.
Assemble your trifle(s) by layering cubes of pound cake, followed by a layer of strawberries, followed by a layer of strawberry mousse.
Repeat the layers and top with whipped cream, a strawberry, and sprinkles if desired.
Nutritional information does not include optional ingredients