LOL - yes, over-worrying

Your dog is a perfect size for an adult male, and a very good weight too.
To go by the letter of the breed standard (FCI - since it describes weight as well as height), he should weigh about 66lb. That's 30kg, which is correct by the standard for a 60cm (23.6 inch) dog.
But bear in mind that that's for mature males. At 2 years old, your guy is really only approaching maturity - which is generally reached somewhere between 2-3 years old. AND it is the standard. Not every dog fits precise standard proportions, just as all humans don't
From your photos, he looks in excellent condition. He still has a waist! And he
should have a waist, even if the majority of pet dogs you see are overweight and have long since lost theirs. I really would not be in the least worried about him, and definitely wouldn't try to change his shape. Very likely, he'll gradually fill out a bit more with age - and the trick then is not to let it go too far (specifically, above 66lb for your dog would be overweight).
PS: Your dog is almost exactly the same height and weight as mine

Except mine had to diet after I
did let him get too fat.