Some dog breeds are much quieter than others such as the Bernese Mountain Dog, the Great Dane, the Golden Retriever, the Pyrenean Mountain Dog, the Mastiff, the Newfoundland, and the Whippet. Some dogs just don’t feel the need to bark at lots of things.
Some breeds such as the golden retriever are amongst some of the quieter dogs.
If you have a new dog he may still be getting used to his surroundings and may not find his voice until he feel comfortable. Having a dog that doesn’t bark isn’t anything to worry about.