Vet said he's okay? Eats well and drinks well?
I can see why you would worry, I love the crazy puppies. On the other hand you have been given the gift of the easy puppy. I've not yet met one myself, just heard rumors
I'd take him to petsmart, see if there is not some toy that would really get him interested,, I'd start tossing toys around, maybe you can find that "perfect" noise. I would also do the happy jumping acting like an idiot to see if I could get my pup excited, with some yummy treats in my hand.
If you are truly blessed with a calm puppy, embrace it, try doing therapy with him and OB, maybe rally or agility when he is old enough will pique his interest.
I don't have this myself so I can't give any real advice, just what I would start with if I were concerned
I can see why you would worry, I love the crazy puppies. On the other hand you have been given the gift of the easy puppy. I've not yet met one myself, just heard rumors

I'd take him to petsmart, see if there is not some toy that would really get him interested,, I'd start tossing toys around, maybe you can find that "perfect" noise. I would also do the happy jumping acting like an idiot to see if I could get my pup excited, with some yummy treats in my hand.
If you are truly blessed with a calm puppy, embrace it, try doing therapy with him and OB, maybe rally or agility when he is old enough will pique his interest.
I don't have this myself so I can't give any real advice, just what I would start with if I were concerned