I have a 3 month old Rottweiler puppy, recently recovered from parvo virus. He completely recovered from parvo 2 weeks back.
He does not eat food since recovered from parvo virus. How long puppy comes back to normal…

After 2 weeks he must eating something.
What are you feeding? Did the vet suggest a bland prescription diet for him?
His digestive tract is going to need time to heal, but most puppies are eating pretty well at the 2 week mark.
Depending on how sick your pup was his recovery time may be slow, I would suggest a call to the vet that treated him and see what they think about the inappetence.