Whisk PB2 and whey protein into almond milk until smooth. Add oats, 1/2 tbsp (6 grams) chia seeds, and melted peanut butter and stir until combined. Refrigerate in a covered container overnight.
Place blueberries in a microwave safe dish. Microwave for 1 to 1 1/2 minutes or until blueberries can be easily mashed with the back of a spoon.
Mash the blueberries until that are all burst. Add remaining chia seeds and stir. Refrigerate overnight or at least 1 hour.
Top overnight oats with blueberry chia jam before serving.