In a medium mixing bowl, whisk together the Greek yogurt, milk, cream cheese, vanilla extract, lemon zest, lemon juice, and sweetener if using.
Add the rolled oats, chia seeds, salt, and chopped strawberries.
Stir well until everything is evenly combined.
Transfer the mixture into a jar or airtight container with a secure lid.
Seal and refrigerate for at least 4 hours, preferably overnight.
Before serving, stir the Strawberry Cheesecake Overnight Oats well.
Top with additional strawberries, graham cracker crumbs, and a spoonful of strawberry jam if desired.
Serve chilled and enjoy.