Newborn puppies are very fragile and their bodies are still developing. They rely heavily on their mother for care and protection during the first few weeks of their lives. Holding them too often or for too long can interfere with the bonding process between the mother and her puppies, and it can also stress the puppies out.
Additionally, 1-day-old puppies have a very weak immune system and are susceptible to infections and diseases. Handling them too often can expose them to germs and increase their risk of getting sick.
If you really want to see or interact with 1-day-old puppies, it's best to do so under the supervision of the mother and for a very short period of time. Avoid touching them directly and maintain a safe distance to minimize any potential risks to the puppies.