
In my own breed even Champion males can remain unused or rarely used.
This can be because the available bitches are too closely related to him, or the bitch owners don't feel his qualities will complement those of the bitch.
On top of that you have the issue of compatible Hereditary health results.
Now your breed is popular, and good breeders will have plenty of males to choose from who have a proven track record in the show ring or working in the field, who, also have good health test results.
For your dog to be used he would be in competition with these dogs.For a start bitch owners would need to see him, to assess his qualities.
This would mean you getting him out to shows or training and competing with him at trials.
Of course you could simply advertise him, and you would maybe get some bitch owners who are neither knowledgeable or responsible. They will then rear the litter and sell to anyone willing to buy, and forget about them.
These pups have a high chance of ending up re-homed and/or in rescue.
Also without health testing there is a higher chance of some of the pups suffering debiltating expensive health issues.
Have you checked his Kennel Club registration certificate to check for endorsements, that most reputable breeders place on registrations?
These are "Progeny not elligible for registration" and "Not eligible for the issue of an export pedigree".
If you have these then his puppies cannot be KC registered.
His breeder could lift these, or not.
Usually a breeder would only lift these once all health testing was carried out, and in their opinion the dog had qualities suitable for breeding (correct temperament and other breed characteristics).
Approaching his breeder would be my first step.They could assess him to see if they consider he is a breeding candidate.
Remember though he is unlikely to be useful to his breeder as they will usually have his close relatives.
So you could end up spending a lot of time and money, and still not attract any breeders.
You would also need to study the breed and breed lines in depth to be able to determine the suitability of any bitches coming to your dog.
Some lines do not produce good results when combined.